Perhaps you should try some spelling variations:
te sach » toc sach
sach vu » sach va, sach tu, sach uu
vu dang » su dang, vu quang, cua dang
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
hanh va » hang va
su tien » su kien, su hien, tu tieng

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 vu dang xa hoi. hieu va cac luc van ((hanh va) or (hanh vi)) su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu dang xa hoi. hieu va cac luc van ((hanh va) OR (hanh vi)) su tien.
• Adding a wildcard symbol may retrieve word variants: te sach vu dang xa hoi. hieu va cac luc van ((hanh va) or (hanh vi)) su tien*.