Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tran » thanh trang, thanh toan, thanh tra
hoc thieu » toc thieu, hoc hien
van nang » van quang, van dong, van dung
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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: hoc thieu xanh - thanh tran ((van ban) or (van nang)) cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tran ((van ban) OR (van nang)) cong tap toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tran ((van ban) or (van nang)) cong tap toan cao*.