Perhaps you should try some spelling variations:
chiet tach » chieu sach
trinh quan » tinh quang, trinh luat, trinh han
thong cong » trong cong, tong cong, thong thong
chai nang » chang nang, phap nang, cam nang
ho chiet » ho chieu, ho thiet, hoc thiet
sinh cua » manh cua, dinh cuu, sinh va
cong san » cong tac
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 quan) or (sinh cua)) thong cong san ((chai nang) or (chan nan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh ((trinh quan) OR (sinh cua)) thong cong san ((chai nang) OR (chan nan)).
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((trinh quan) or (sinh cua)) thong cong san ((chai nang) or (chan nan))*.