Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
theo sach » thuoc sach, te sach, theo lich
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
thoai cac » tai cac, thong cac, tho cac
cong tan » cong tac, cong san, cong thanh
thai cao » tai cao, thuat cao, toan 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 ((thai cao) OR (thoai cac))~.
• 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 ((thai cao) OR (thoai cac)).
• 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 ((thai cao) OR (thoai cac))".
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chieu sach)) - manh trung cua nhung cong tan ((thai cao) OR (thoai cac))*.