Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
luat chung » luan chung, luat thuong, cua chung
cua thuong » cua truong, cua phuong, ca thuong
mot chieu » doi chieu, ho chieu
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: ((theo chieu) or (mot chieu)) xanh - thanh trung ((luat chung) or (cua thuong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (mot chieu)) xanh - thanh trung ((luat chung) OR (cua thuong)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (mot chieu)) xanh - thanh trung ((luat chung) or (cua thuong)) cong tac toan cau*.