Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
nhung cong » dung cong, thong cong, hang cong
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
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: ((toc thieu) or (theo chieu)) xanh - hanh ((tang cua) or (mang cua)) nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (theo chieu)) xanh - hanh ((tang cua) OR (mang cua)) nhung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((toc thieu) or (theo chieu)) xanh - hanh ((tang cua) or (mang cua)) nhung cong tac toan cau*.