Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
lang van » dang van, tang van, hoang van
va thanh » gia thanh, ban thanh, va tinh
bac hoc » bai hoc, bac ho
nang xa » nang x, lang xa, nang ma
tai cua » thai cua, tai cuc, tri cua
cac hoc » cach hoc, cac hop, cac toc
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((nang xa) or (lang van)) hoi. hieu qua ((cac hoc) or (bac hoc)) va thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (lang van)) hoi. hieu qua ((cac hoc) OR (bac hoc)) va thanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (lang van)) hoi. hieu qua ((cac hoc) or (bac hoc)) va thanh tai cua te*.