Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu sach » tu sach, thuat sach, thuoc sach
cham hoi » cham voi, cham h'roi, pham hoai
may hoi » may thoi, tay hoi, mai hoi
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
y mang » cay mang
cam o » cham o, cam lo, ca o

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y mang may hoi. hieu ve ((cham hoi) or (cam o)) gia thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y mang may hoi. hieu ve ((cham hoi) OR (cam o)) gia thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y mang may hoi. hieu ve ((cham hoi) or (cam o)) gia thanh vai cua tre*.