Only a short post.

As you see, ithere's nothing here.

I don't have time to write anything down any because recently I get received a tones of corrections by the people on LangCorrect.

You guys've been helped me a lot.

This is technically correct but is probably better spoken than written. "You guys have helped me a lot" would be best.

And since I gotta add them to Anki to learn grammar and vocabulary.,

W- which is costtakes me hours to add. -

I'm still not done yet XD ¶
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That's means I just want to spend more time for getting done the flashcards done before having new ones.

DIt doesn't mean I don't want any correction ;v ¶
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Anyways, no one has been posted any Vietnamese posts on the Feed in about 6 months, so I can't make any correction, about 6 months.

I don't know how to give back to you guys back.

Only a short post.

As you see, it's nothing's here.

I don't have time to write down anything because recently I get received a tones of correction bys from the people on LangCorrect.

You guys've been helped me a lot.

There are red squiggles under the "guys've," indicating a spelling error. I don't think this is a spelling error (could be wrong), but it is something that you would hear in colloquial speech (especially mine!), so I left it as correct.

Which ihas cost me hours to add./Which takes lots of time.

The original would have to be "Which has cost me hours to add," because the auxiliary verb must be "to have." This is grammatically correct, though a little unnatural for an anglophone. It's fairly poetic though, which is fitting because this seems to be a poem.

I'm still not done yet XD ¶
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That's means I just want to spend more time for getting done the flashcards done before having new ones.

Doesn't mean I don't want any correction ;v ¶
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Anyways, no one has been posted any Vietnamese post on the Feed so I canfor me to make correction,s for about 6 months.

I don't know how to give back to you guys back.

OThis is only a short post.

This is the full sentence.

As you can see, ithere's nothing here.

Generally, the phrase is "as you can see".

I don't have time to write down anything because recently I gethave received a tones of correction by s from (the) people on LangCorrect.

(1) "Any" on its own must be used in reference to a previously mentioned noun, for example: "As you can see, there are no words here. I didn't have the time to write down any." Here, "any" is used to refer to "words".
(2) Alternatively, if you still want to use "get": "because recently I got a ton of corrections" or "because recently I have gotten a ton of corrections".
(3) "Ton" implies more than one, so the plural ("corrections") is expected.
(4) The phrase is "receive (something) from (someone)".

You guys've been have helped me a lot.

(1) "Guys've" looks very strange. In my experience, the contraction " 've" is typically used only after pronouns, as in "they've" and "we've".
(2) "Been helped" is ungrammatical in this context, but it might be used in a phrase like "he's been helped by his friends a lot". Alternatively: "You guys have been helping me a lot."

And since(now) I gotta add them to Anki to learn grammar and vocabulary.

"Since" establishes a cause, and makes the reader expect an effect in a cause and effect sequence. However, we don't seem to get that effect here, so I removed the word.

Which is costtakes me hours to addo.

(1) The more suitable verb here might be "take", since "cost" often implies some sort of sacrifice or tradeoff.

(2) When you use "which" here, you are referring to the ACT of adding flashcards (from the previous sentence), not the flashcards themselves. Hence, the verb to use here is "do" and not "add". Perhaps you meant to refer to "grammar and vocabulary", but even so, you don't "add grammar and vocabular"; you "add grammar and vocabulary flashcards".

(3) Building on (2), since the act of adding flashcards is a singular act, note that we use "takes" and not "take".
(4) You can consider merging this sentence with the previous one: "And now I gotta add them to Anki to learn grammar and vocabulary, which takes me hours to do."

I'm still not done yet XD ¶
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That's means I just want to spend more time for getting done the flashcards done before having new ones.

Similar to the previous sentence, in the same way that "is cost" is ungrammatical, so is "is mean", unless you're using "mean" as an adjective.

DThat doesn't mean I don't want any correction ;v ¶
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Anyways(s), no one has been posting any Vietnamese (posts) on Fthe feed so I can make corrections, for about (the last) 6 months.

(1) "Correction" (uncountable) refers to the act of giving corrections, while "corrections" (countable) refers to the actual individual corrections. Both are acceptable here.
(2) "Anyways" is fine, but it is non-standard and might be considered more informal. The standard form is "anyway".
(3) "Has been" implies the progressive/continuous tense, so it should be "posting" and not "post".
(4) When "any" is used this way, the following noun is typically plural.
(5) You can omit "posts", and indeed I'd suggest that you do, as "posting...posts" sounds quite silly. Just "posting...Vietnamese" will suffice.

I don't know how to give back to you guys back.

The phrase is "give back to (someone)". Generally, these three words stick together.