Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
cua thuong » cua truong, cua phuong, ca thuong
cua thong » cua khong, cua tong, suat thong
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 - hanh trinh ((cua thong) or (cua thuong)) cong tan can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh ((cua thong) OR (cua thuong)) cong tan can cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh ((cua thong) or (cua thuong)) cong tan can cau*.