Perhaps you should try some spelling variations:
sach kem » hanh kem
kem nang » ke nang, mem nang, tiem nang
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham duc » pham duc, tham du, than duc
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
lai cua » dai cua, hai cua, lai chau
5 hoi » o 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 kem nang ((5 hoi) or (xa hoi)). hieu van tham duc ban hanh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach kem nang ((5 hoi) OR (xa hoi)). hieu van tham duc ban hanh lai cua vat.
• Adding a wildcard symbol may retrieve word variants: su sach kem nang ((5 hoi) or (xa hoi)). hieu van tham duc ban hanh lai cua vat*.