Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » su sach, te sach, tu cach
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ty sang » ty xang, ty hang, duy sang
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa

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 (thu sach)) ty sang ((ma hoi) or (xa hoi)). hieu ve cac tuc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty sang ((ma hoi) OR (xa hoi)). hieu ve cac tuc va hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty sang ((ma hoi) or (xa hoi)). hieu ve cac tuc va hanh lai cua tre*.