Perhaps you should try some spelling variations:
trinh viet » ninh viet, trinh vat
vu khach » vu khanh, vu khac, vay khach
cham duc » pham duc, cham soc, pham duy
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc lap » doc lap, duc lai, duc lam
viet va » viet van, viet ha, tiet 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: ((((tu cach) OR (tu cac))) OR (vu khach)) ky nang xa hoi. hieu va cham duc lap trinh viet va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu cach) OR (tu cac))) or (vu khach)) ky nang xa hoi. hieu va cham duc lap trinh viet va triet~".
• Adding a wildcard symbol may retrieve word variants: ((((tu cach) OR (tu cac))) or (vu khach)) ky nang xa hoi. hieu va cham duc lap trinh viet va triet*.