Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
thanh chau » thanh cha, thanh cham, thanh chu
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong thuc » cong tac
cong tuc » cong tac, cong suc, cong tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chieu sach)) - thanh trung cua nhung ((cong tuc) OR (cong thuc)) thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - thanh trung cua nhung ((cong tuc) OR (cong thuc)) thanh chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - thanh trung cua nhung ((cong tuc) OR (cong thuc)) thanh chau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - thanh trung cua nhung ((cong tuc) OR (cong thuc)) thanh chau*.