Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
lky nang » ly nang, ki nang, ke nang
dau thuc » dan thuc, dai thuc, dam thuc
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
hanh ve » hanh vi, hanh va, hanh kem
va dau » va dao
ve cau » ke cau, va cau, ve cac

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) or (lky nang)) xa hoi. lieu va dau thuc van hanh ve cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ((ky nang) OR (lky nang)) xa hoi. lieu va dau thuc van hanh ve cau tren.
• Adding a wildcard symbol may retrieve word variants: vu khach ((ky nang) or (lky nang)) xa hoi. lieu va dau thuc van hanh ve cau tren*.