Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
theo sach » thuoc sach, te sach, theo lich
trung hua » trung ha, trung hoa, trung cua
hua thong » hoa thong, hua khong, huu thong
thanh lap » thanh san, phan lap, thanh van
thanh hai » thanh phan, thanh hoa, thanh san
cong tan » cong tac, cong san, cong thanh

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 hua thong cong tan ((thanh lap) OR (thanh hai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (chieu sach)) - manh trung hua thong cong tan ((thanh lap) OR (thanh hai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((theo sach) or (chieu sach)) - manh trung hua thong cong tan ((thanh lap) OR (thanh hai))".
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chieu sach)) - manh trung hua thong cong tan ((thanh lap) OR (thanh hai))*.