Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hanh vai » hanh vi, hanh va, hanh tai
vu sach » vu bach, su sach
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
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: ((vu sach) or (vu khach)) ky nang o hoi. hieu ve cam tuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky nang o hoi. hieu ve cam tuc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) ky nang o hoi. hieu ve cam tuc va hanh vai cua tre*.