Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tru nang » tra nang, tri nang, truc nano
van manh » van minh, van anh, van hanh
manh hai » lanh hai, minh hai, thanh hai
va triet » va thiet, va trien, ve triet
tu sach » su sach, te sach, tu cach
qua hac » qua hai, qua cac, qua hoat
hac tuc » thac toc, thai tuc
tuc van » thuc van, truc van, tuc va
hai va » hai van, thai va, hoi va
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) tru nang x hoi. hieu qua hac tuc van manh hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) tru nang x hoi. hieu qua hac tuc van manh hai va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) tru nang x hoi. hieu qua hac tuc van manh hai va triet*.