Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
cong tanh » cong thanh, cong tinh, cong danh
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
tuan cau » toan cau, quan cau, tuan cu

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 quan nhung ((cong tanh) or (cong tan)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh quan nhung ((cong tanh) OR (cong tan)) tuan cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh quan nhung ((cong tanh) or (cong tan)) tuan cau*.