Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van cham » van chat, van tham, va cham
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, duc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuoc sach)) ky nang ma hoi. hieu van cham ((tuc va) or (tuc xa)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ky nang ma hoi. hieu van cham ((tuc va) OR (tuc xa)) thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuoc sach)) ky nang ma hoi. hieu van cham ((tuc va) or (tuc xa)) thanh vi cua tre*.