Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ty » sach ty
van hanh » van thanh, ban hanh, van anh
hanh ve » hanh vi, hanh va, hanh kem
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va
hieu ve » hieu van
ty nang » ky nang, ty xang, ty hang
su viet » so viet
x hoi » xa hoi, o hoi, x ho
ve su » va su

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 x hoi. ((hieu ve) or (((hieu va) or (hieu qua)))) cam duc van hanh ve su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ty nang x hoi. ((hieu ve) OR (((hieu va) OR (hieu qua)))) cam duc van hanh ve su viet.
• Adding a wildcard symbol may retrieve word variants: vu khach ty nang x hoi. ((hieu ve) or (((hieu va) or (hieu qua)))) cam duc van hanh ve su viet*.