Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
su sach » so sach, vu sach
lai cua » dai cua, hai cua, lai chau
xuc van » duc van, luc van, vuc van
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ty hang » ly hang, ty xang, thi hang
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thu sach)) ty hang ((ma hoi) or (xa hoi)). hieu ve chat xuc van hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ty hang ((ma hoi) OR (xa hoi)). hieu ve chat xuc van hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ty hang ((ma hoi) or (xa hoi)). hieu ve chat xuc van hanh lai cua tre*.