Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
hanh dung » thanh dung, anh dung, hanh dong
luan cong » luong cong, luan chung, luan luong
luat cong » thuat cong, luat chung, cua cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 ((chau tinh) or (trieu tinh)) - hanh dung ((luan cong) OR (luat cong)) cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chau tinh) OR (trieu tinh)) - hanh dung ((luan cong) OR (luat cong)) cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chau tinh) or (trieu tinh)) - hanh dung ((luan cong) OR (luat cong)) cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chau tinh) or (trieu tinh)) - hanh dung ((luan cong) OR (luat cong)) cong tan toan cau*.