Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
tan thanh » tran thanh, tang thanh, toan thanh
thanh mau » hanh mau, thanh san, thanh hai
cong tan » cong tac, cong san, cong thanh

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