Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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: ((su sach) or (thu sach)) ky nang ((xa hoi) or (mai hoi)). hieu va cam tuc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky nang ((xa hoi) OR (mai hoi)). hieu va cam tuc va hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky nang ((xa hoi) or (mai hoi)). hieu va cam tuc va hanh lai cua tre*.