Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
soc van » hoc van, oc van, soc dan
sac van » cac van, san van, sat van
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
anh te » anh tu, anh ta, anh ve
te cua » tue cua, le cua, de 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) OR (lang xa)) hoi. hieu vu cham ((soc van) OR (sac van)) anh te cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) OR (lang xa)) hoi. hieu vu cham ((soc van) or (sac van)) anh te cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu vu cham ((soc van) or (sac van)) anh te cua triet*.