Perhaps you should try some spelling variations:
tien manh » tien anh, tien thanh, tieng anh
dung cong » dung trong
dien anh » tieng anh, dien dan
bang cua » ban cua, mang cua, hang cua
ban quan » van quan
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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 ((dien anh) or (tien manh)) - tinh ((bang cua) or (ban quan)) dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien anh) OR (tien manh)) - tinh ((bang cua) OR (ban quan)) dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((dien anh) or (tien manh)) - tinh ((bang cua) or (ban quan)) dung cong tac toan cau*.