Perhaps you should try some spelling variations:
gian cua » gian xu, ban cua
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc va » loc va, doc va, goc va
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 sach ty nang xa hoi. hieu ve cham ((soc va) OR (hoc va)) dan ((va cua) or (gian cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu ve cham ((soc va) OR (hoc va)) dan ((va cua) OR (gian cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ve cham ((soc va) OR (hoc va)) dan ((va cua) or (gian cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ve cham ((soc va) OR (hoc va)) dan ((va cua) or (gian cua)) tre*.