Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
vai cua » dai cua, hai cua, lai cua
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa

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) or (toc sach)))) ky tang ma hoi. hieu van cam xuc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((te sach) OR (toc sach)))) ky tang ma hoi. hieu van cam xuc va thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((te sach) or (toc sach)))) ky tang ma hoi. hieu van cam xuc va thanh vai cua tre*.