Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cap » truong cao, trung tam
trung ca » truong ca, trung cua, trung can
cong tac » cong ty
than cau » phan cau, than cap, thanh chau
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: hoc chieu sach - thanh ((trung ca) or (trung cap)) trong cong tac ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh ((trung ca) OR (trung cap)) trong cong tac ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - thanh ((trung ca) or (trung cap)) trong cong tac ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - thanh ((trung ca) or (trung cap)) trong cong tac ((than cau) OR (toan cau))*.