Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
dang cong » dung cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
cong cu » chung cu
cu dang » cua dang, su dang, vu dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu nganh) or (trieu tinh)) - thanh cong cu dang cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (trieu tinh)) - thanh cong cu dang cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (trieu tinh)) - thanh cong cu dang cong tan toan cao*.