Perhaps you should try some spelling variations:
chiet tach » chieu sach
trinh quan » tinh quang, trinh luat, trinh han
cong thanh » dong thanh, cong trinh, truong thanh
trinh cua » tinh cua, trinh luat, trinh luan
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan ban, toan tap

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 (trinh quan)) dung ((cong tan) or (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh ((trinh cua) OR (trinh quan)) dung ((cong tan) OR (cong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh ((trinh cua) OR (trinh quan)) dung ((cong tan) or (cong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((trinh cua) OR (trinh quan)) dung ((cong tan) or (cong thanh)) toan cau*.