Perhaps you should try some spelling variations:
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
xuc gia » luc gia, tuc gia, quoc gia
duc gia » quoc gia
ve cam » ve cham, ve cac, va cam
va chu » va che, va cau
va chi » van chi, va che, va cai

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: te sach ty nang xa hoi. hieu ve cam ((xuc gia) OR (duc gia)) thanh ((va chu) OR (va chi)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ve cam ((xuc gia) OR (duc gia)) thanh ((va chu) or (va chi)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ve cam ((xuc gia) OR (duc gia)) thanh ((va chu) or (va chi)) tre*.