Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
danh hoi » danh hoa, dan hoi, danh hoc
thuc dan » thuc hanh, hoc dan, thuc vat
hoi cua » hoi chuc
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 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 ky nang ((x hoi) OR (o hoi)). hieu va cac ((tuc va) or (thuc dan)) danh hoi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang ((x hoi) OR (o hoi)). hieu va cac ((tuc va) OR (thuc dan)) danh hoi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang ((x hoi) OR (o hoi)). hieu va cac ((tuc va) or (thuc dan)) danh hoi cua te*".