Perhaps you should try some spelling variations:
gian cua » gian xu, ban cua
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
soc va » hoc va, loc va, doc va
va dan » ca dan, va dao, va dau
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang xa hoi. hieu vu cham soc va dan ((va cua) or (gian cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu vu cham soc va dan ((va cua) OR (gian cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu vu cham soc va dan ((va cua) or (gian cua)) tre*.