Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
nhung cong » dung cong, thong cong, hang cong
theo chu » cho chu, chao chu, theo yeu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
mang va » mang vua, hang va, dang va
bang va » hang va, ban va, trang va

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 (theo chu)) xanh - hanh ((mang va) or (bang va)) nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) xanh - hanh ((mang va) OR (bang va)) nhung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) xanh - hanh ((mang va) or (bang va)) nhung cong tac toan cau*.