Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hieu manh » chieu xanh, hieu nganh, dieu hanh
luong tai » dung tai, luong va
doc hieu » toc thieu, hoc thieu, hoc hien
van nang » van quang, van ban, van dung
tai toan » bai toan, tap toan, tai tuan
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: doc hieu manh - thanh tran ((van nang) or (van dong)) luong tai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - thanh tran ((van nang) OR (van dong)) luong tai toan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - thanh tran ((van nang) or (van dong)) luong tai toan cao*.