Perhaps you should try some spelling variations:
trung thanh » truong thanh
manh trung » manh tung, thanh trung, manh hung
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, phong chong
theo sach » thuoc sach, te sach, theo lich
tang thai » trang thai, tang tai, tang thi
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 thanh ((thong cong) OR (thong thong)) tang thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (chieu sach)) - manh trung thanh ((thong cong) OR (thong thong)) tang thai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((theo sach) or (chieu sach)) - manh trung thanh ((thong cong) OR (thong thong)) tang thai cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chieu sach)) - manh trung thanh ((thong cong) OR (thong thong)) tang thai cao*.