Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
tan can » toan can, tan van, ban can
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh trung ((cua thong) or (cua khong)) cong tan can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh trung ((cua thong) OR (cua khong)) cong tan can cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh trung ((cua thong) or (cua khong)) cong tan can cau*.