Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
tu cach » tu cac
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va
xuc va » duc va, tuc va, luc va
cua te » cua tu
nang o » nang co, nang ho, nang ro
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 cach) or (toc sach)) ky nang o hoi. ((hieu ve) or (hieu van)) cam xuc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (toc sach)) ky nang o hoi. ((hieu ve) OR (hieu van)) cam xuc va hanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (toc sach)) ky nang o hoi. ((hieu ve) or (hieu van)) cam xuc va hanh tai cua te*.