Perhaps you should try some spelling variations:
cac viet » cach viet, bac viet, ca viet
dinh tai » dinh toai, dinh tri, dinh thi
ve cham » va cham, ve chat, vu cham
nang xa » nang x, lang xa, nang ma
tai cac » tai cuc
ve cam » ve cac, va cam, ve cai
san ky » sang ky, van ky, dan ky
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
tu san » thu san, tu ban, tu can

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

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