Perhaps you should try some spelling variations:
chiet tach » chieu sach
cong thanh » dong thanh, cong trinh, truong thanh
doi chiet » doi chieu, doi chi, doi viet
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
tinh cua » trinh cua, sinh cua, tinh chat
cong tan » cong tac, cong san, cong ty
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh tinh cua nhung ((cong tan) OR (cong thanh)) ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh tinh cua nhung ((cong tan) OR (cong thanh)) ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh tinh cua nhung ((cong tan) OR (cong thanh)) ((toan tap) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh tinh cua nhung ((cong tan) OR (cong thanh)) ((toan tap) or (toan ban))*.