Perhaps you should try some spelling variations:
vu khach » vu khanh, vay khach, cua khach
nang hoc » nang doc, nang luc, dong hoc
vu khac » vu kham, vu khanh, bui khac
hoc hoi » hoc khoi, hoc hoa, hoc noi
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) or (vu khac)) ky nang hoc hoi. hieu va cam tu va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (vu khac)) ky nang hoc hoi. hieu va cam tu va hanh vi cua tre*.