Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, truong thanh
theo sach » thuoc sach, te sach, theo lich
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tan » cong tac, cong san, cong ty
thai cao » tai cao, thoai cac, thuat cao

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

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