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 » su sach
hieu ve » hieu va, hieu van
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
cam tu » cam thu, nam tu, dam tu
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 bach))) or (vu khach)) ky nang o hoi. hieu ve cam tu va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu sach) OR (vu bach))) OR (vu khach)) ky nang o hoi. hieu ve cam tu va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((vu sach) or (vu bach))) or (vu khach)) ky nang o hoi. hieu ve cam tu va hanh vai cua tre*.