Perhaps you should try some spelling variations:
te sach » toc sach
hieu va » lieu va, hieu qua
luc gia » luoc gia, duc gia, quoc gia
cam luc » cam xuc, cau luc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cuu » ve cau, ve chu, ve cum
ve cua » le cua, de cua, te 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) or (hieu va)) cam luc gia thanh ((ve cuu) OR (ve cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. ((hieu ve) OR (hieu va)) cam luc gia thanh ((ve cuu) OR (ve cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. ((hieu ve) or (hieu va)) cam luc gia thanh ((ve cuu) OR (ve cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. ((hieu ve) or (hieu va)) cam luc gia thanh ((ve cuu) OR (ve cua)) tre*.