Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
tong cong » trong cong, cong cong, dung cong
ho chieu » hoc thieu, doi chieu, mot chieu
anh bang » anh hoang, anh quang, tinh bang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
bang va » hang va, ban va, trang va
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (ho chieu)) tach - anh bang va tong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) tach - anh bang va tong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) tach - anh bang va tong cong tac toan cau*.