Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh han » trinh quan
han nhung » hanh nhung, hon nhung, ban nhung
cong tinh » cong trinh, cong vinh, long tinh
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
tuan tu » tuan thu, tran tu, toan tu

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