Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cuc tre » duc tre, cua tre, cuu tre
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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 (su sach)) ky nang ((o hoi) or (co hoi)). hieu va cac xuc van hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((o hoi) OR (co hoi)). hieu va cac xuc van hanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((o hoi) or (co hoi)). hieu va cac xuc van hanh tai cuc tre*.