Perhaps you should try some spelling variations:
te sach » toc sach
ve cham » va cham, ve chat, vu cham
via cua » gia cua, gian cua, giau cua
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc va
va cua » va chua, ca cua, ma 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 (doc va)) dan ((va cua) or (via 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 (doc va)) dan ((va cua) OR (via 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 (doc va)) dan ((va cua) or (via cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ve cham ((soc va) OR (doc va)) dan ((va cua) or (via cua)) tre*.