Perhaps you should try some spelling variations:
nthanh hang » tranh hang, thanh hung, thanh hoang
thanh hang » thanh hoang, thanh thang, tranh hang
nhung cong » dung cong, thong cong, hang cong
tieu tinh » trieu tinh, tieu trinh, lieu tinh
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu tinh - ((thanh hang) or (nthanh hang)) va nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - ((thanh hang) OR (nthanh hang)) va nhung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - ((thanh hang) or (nthanh hang)) va nhung cong tac toan cau*.