Perhaps you should try some spelling variations:
tinh vai » tinh va, tinh hai, tinh bai
vat tinh » sat tinh, vat sinh, hoat tinh
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
va nham » va cham, va tham, va kham
ty hang » ly hang, ty xang, thi hang
cua tre » cua te, cuu tre, cua triet
va nha » va nho, ve nha
ma hoi » mai hoi, ma hoa, me hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty hang ((ma hoi) OR (xa hoi)). hieu ((va nham) OR (va nha)) thuc vat tinh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty hang ((ma hoi) OR (xa hoi)). hieu ((va nham) or (va nha)) thuc vat tinh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ty hang ((ma hoi) OR (xa hoi)). hieu ((va nham) or (va nha)) thuc vat tinh vai cua tre*.