Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
lai hoi » lai hoa, lai roi, mai hoi
dai hoi » dai hoc, dai hai, dai moi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vu cam » vu cham, vu cao, va cam
di cua » dai cua, doi cua, de cua

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 y nang ((lai hoi) or (dai hoi)). hieu vu cam xuc ((van hanh) or (ban hanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((lai hoi) OR (dai hoi)). hieu vu cam xuc ((van hanh) OR (ban hanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((lai hoi) or (dai hoi)). hieu vu cam xuc ((van hanh) or (ban hanh)) di cua tre*.