Researching: Vietnamese learners errors in English writing test

The title has said all i want. It''s hard to collect a huge number of errors if I have no help from you. So thanks for any idea. PLZ!
Any mistake in writing test you often make, wrong use of verb tenses, prepossisions, articles,.....
It''s more helpful when you give me commend or tips for those errors.
I am a freshman here, thankz!!!!!!

prepositions ^^ not prepossissions

Don''t know about the rest but, for the highlighted sentence, you could just simply write "The title said it all!" Because the way you wrote it, it sounds exactly... Vietnamese! (The title said all I want)
Know what I mean?

Thanks, but I need more. None can help me?

I suggest you go buy and read this book "Writing Academic English"... Try to get the latest e***ion as the earlier e***ions seem to have lots of typos (typing errors).