Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh dai » hanh tai, hanh dao, vanh dai
sach ky » sac ky, sach y, sach ty
han tai » hang tai, nhan tai, van tai
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
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: thu sach ky nang ((ma hoi) or (xa hoi)). hieu ve cam cuc ban ((hanh dai) or (han tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cam cuc ban ((hanh dai) OR (han tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) or (xa hoi)). hieu ve cam cuc ban ((hanh dai) or (han tai)) cua tre*.