Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ty » sach ty
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
ty nang » ky nang, ty xang, ty hang
cac xuc » cam xuc, cac nuoc, chat xuc
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
vi va » vi van, vai va, vu va
nuoc » quoc, duoc, ngoc
thiet » thieu

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 ty nang o hoi. lieu va ((cac xuc) or (hoc nuoc)) ((va thanh) or (van hanh)) vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ty nang o hoi. lieu va ((cac xuc) OR (hoc nuoc)) ((va thanh) OR (van hanh)) vi va thiet.
• Adding a wildcard symbol may retrieve word variants: vu khach ty nang o hoi. lieu va ((cac xuc) or (hoc nuoc)) ((va thanh) or (van hanh)) vi va thiet*.