Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
trinh ban » trinh han, trinh san, trinh dan
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, toan ban

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