Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
soc dan » hoc dan, so dan, sac dan
sac van » cac van, san van, sat van
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
te cua » tue cua, de cua
le cua » ly cua

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 sac ky nang xa hoi. hieu vu cham ((soc dan) OR (sac van)) anh ((te cua) OR (le cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu vu cham ((soc dan) or (sac van)) anh ((te cua) OR (le cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu vu cham ((soc dan) or (sac van)) anh ((te cua) OR (le cua)) triet*.