Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo sach » thuoc sach, te sach, theo lich
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
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) OR (trung cap)) nhung 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) OR (trung cap)) nhung cong tan thai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((theo sach) or (chinh sach)) - manh ((trung cua) OR (trung cap)) nhung cong tan thai cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chinh sach)) - manh ((trung cua) OR (trung cap)) nhung cong tan thai cao*.