Perhaps you should try some spelling variations:
cuu thuc » cuu tac
qua cham » qua hai, qua cac, va cham
thanh va » thanh van, hanh va, thanh ha
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
tu sach » thu sach, su sach, tu cach
ha hoi » hoa hoi, ha noi, xa hoi
xac va » tac va, ac va, bac va
va cuu » va cau, va chu, va huu

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 (te sach)) ky lang ha hoi. hieu qua cham ((xac va) or (duc va)) thanh va cuu thuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang ha hoi. hieu qua cham ((xac va) OR (duc va)) thanh va cuu thuc.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang ha hoi. hieu qua cham ((xac va) or (duc va)) thanh va cuu thuc*.