Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
cua dong » chua dong, cua dang, cua nong
cong tan » cong tac, cong san, cong thanh
tan hanh » tan thanh, tang hanh, toan hanh
hanh cac » hang cac, hanh cat, nhanh cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh trung ((cua cong) or (cua dong)) cong tan hanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trung ((cua cong) OR (cua dong)) cong tan hanh cac.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung ((cua cong) or (cua dong)) cong tan hanh cac*.