Perhaps you should try some spelling variations:
bien tinh » bi tinh, yen tinh, diep tinh
dang cong » dung cong
thong tu » phong tuc, thong tin, thong ke
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan ban
ho bien » pho bien, hoa bien, so bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho bien tinh - hanh ((thong xay) or (thong tu)) dang cong tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho bien tinh - hanh ((thong xay) OR (thong tu)) dang cong tan toan tap.
• Adding a wildcard symbol may retrieve word variants: ho bien tinh - hanh ((thong xay) or (thong tu)) dang cong tan toan tap*.