Perhaps you should try some spelling variations:
dan khanh » dang khanh, van khanh, dat khanh
nam thuc » nam thuoc, am thuc, nam thu
vu khach » vu khanh, vu khac, vay khach
thuc dan » thuc hanh, hoc dan, thuc vat
khanh vi » hanh vi, khanh v, nhanh vi
hieu ve » hieu van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, 5 hoi

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 y nang ((x hoi) or (x ho)). ((hieu ve) or (hieu va)) nam thuc dan khanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach y nang ((x hoi) OR (x ho)). ((hieu ve) OR (hieu va)) nam thuc dan khanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu khach y nang ((x hoi) or (x ho)). ((hieu ve) or (hieu va)) nam thuc dan khanh vi cua tre*.