Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu luc » hieu luat, hieu qua
va doanh » van doanh, vay doanh, va danh
chat xuc » chat huu, cam xuc, chao xu
hieu tuc » hieu thuc, hieu thuoc, lieu thuc
tu cach » tu cac
va viet » hoa viet, san viet, mai viet
nang xa » nang x, lang xa, nang ma
te sach » toc sach
xuc va » duc va, tuc va, luc va
van va » van vat, van van, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky nang xa hoi. ((hieu tuc) OR (hieu luc)) chat xuc va doanh van va viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang xa hoi. ((hieu tuc) OR (hieu luc)) chat xuc va doanh van va viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang xa hoi. ((hieu tuc) OR (hieu luc)) chat xuc va doanh van va viet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang xa hoi. ((hieu tuc) OR (hieu luc)) chat xuc va doanh van va viet*.