Help me, please!

Hi Katerina, first of all, your written English is very good I understand perfectly the message you are wanting to convey. The only things I see that may be an issue is the context of the words used in your sentence above. The word "Maybe" is a tricky word, there are two forms of this word. "Maybe" and "may be" when it is spoken it sounds exactly the same, as one word, "maybe" it can be written as "maybe" and "may be" depending on the context. Example: "She may be the one" or "Maybe we can go to the store, when I have completed my task". The word Advice can be used as Advice or Advises(Notice the difference of the ending letters, pronounced "ad-vice" or "ad-vises" the "d" is strong). Example: "Can you give me some advice on how to proceed?" or "The manager advises his staff to work safely" How I would correct your sentence above. "So, maybe you know and use various advice on how to learn foreign languages quickly and correctly? Can you tell me your secrets of learning English?" I hope this helps and as with any language it takes time to get use to the correct sentence structure of that language. I use a program called Fluenz to help with my french. The have a demo at http://dayone.fluenz.com/

Oops, "my bad" (teen slang), quality can be used as an adjective - I meant adverb! You can do high 'quality work', but you cannot 'work quality'.

fyi, pointers: it's "maybe", not "may be", "advice", never "advices" (from native American) followed by "on ", "quality" is noun not adjective, maybe you want to learn "well", or "efficiently"?

So, may be you know and use various advices how to learn foreign language quickly and quality. Can you tell your secrets of learning English?

I would like to help you as well.

Yes, I want.