Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tri cua, dai cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
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: te sach ky nang ((o hoi) or (co hoi)). hieu va cac xuc van hanh ((thai cua) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((o hoi) OR (co hoi)). hieu va cac xuc van hanh ((thai cua) OR (tai cuc)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((o hoi) or (co hoi)). hieu va cac xuc van hanh ((thai cua) or (tai cuc)) tre*.