Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
loc ban » lo ban, hoc ban, coc ban
ve cham » va cham, ve chat, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
ty sang » ty xang, ty hang, duy sang
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty sang ((mai hoi) or (xa hoi)). hieu ((ve cham) or (ve cac)) loc ban hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty sang ((mai hoi) OR (xa hoi)). hieu ((ve cham) OR (ve cac)) loc ban hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty sang ((mai hoi) or (xa hoi)). hieu ((ve cham) or (ve cac)) loc ban hanh dai cua tre*.