Perhaps you should try some spelling variations:
chiet tach » chieu sach
trinh cua » trinh luat, trinh quan, trinh luan
hang cong » dang cong, hang nong, bang cong
ho chiet » ho chieu, ho thiet, hoc thiet
tinh cua » sinh cua, tinh chat, tranh cua
cong san » cong tac
chay nan » chai nang, chae ran, cham nen
chan nan » chan nhan, chang nang, chan doan

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) or (tinh cua)) hang cong san ((chay nan) or (chan nan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh ((trinh cua) OR (tinh cua)) hang cong san ((chay nan) OR (chan nan)).
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((trinh cua) or (tinh cua)) hang cong san ((chay nan) or (chan nan))*.