Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
vu khach » vu khanh, vu khac, vay khach
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
so sach » so sanh, bo sach, co sach
su sach » vu sach
nang xa » nang x, lang xa, nang ma
vi va » vi van, vai va, vu va

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu khach) OR (su sach))) OR (so sach)) ky nang xa hoi. hieu van cham truc van hanh vi va triet~.
• Adding a wildcard symbol may retrieve word variants: ((((vu khach) or (su sach))) or (so sach)) ky nang xa hoi. hieu van cham truc van hanh vi va triet*.