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
tranh ban » trinh ban, tranh hang, tranh luan
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
tran ban » tran van, toan ban, tran bai

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 (tranh 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 (tranh ban)).
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh luan dung cong tan ((tran ban) or (tranh ban))*.