Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
ban hanh » ban hang
tham duc » pham duc, tham du, than duc
van tham » van thanh, van tuan, van chat
hieu van » hieu va, thien van, lieu va
su sach » vu sach
duc ban » duc tan, duc van, dua ban
lai cua » dai cua, hai cua, lai chau
ki nang » ky nang
so sach » so sanh, bo sach, co sach
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) OR (so sach)) ki 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) OR (so sach)) ki nang ((5 hoi) OR (xa hoi)). hieu van tham duc ban hanh lai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ki 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) OR (so sach)) ki nang ((5 hoi) or (xa hoi)). hieu van tham duc ban hanh lai cua vat*.