Perhaps you should try some spelling variations:
hien nganh » vien nganh, hien nhanh, hieu nganh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nganh) or (hieu manh)) - canh tranh va dung cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nganh) OR (hieu manh)) - canh tranh va dung cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nganh) or (hieu manh)) - canh tranh va dung cong tan toan ban*.