Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
theo sach » thuoc sach, te sach, theo lich
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan thai » tay thai, ban thai, tan tai
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 (chinh sach)) - manh trung cua dung cong tan thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (chinh sach)) - manh trung cua dung cong tan thai cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chinh sach)) - manh trung cua dung cong tan thai cao*.