Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
te sach » toc sach
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang ((x hoi) or (o hoi)). hieu van cham duc van hanh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ((x hoi) OR (o hoi)). hieu van cham duc van hanh lai cua vat.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ((x hoi) or (o hoi)). hieu van cham duc van hanh lai cua vat*.