Perhaps you should try some spelling variations:
chat xuc » chat huu, chao xu, chat cua
hieu van » hieu va, thien van, lieu va
te sach » toc sach
doan vi » doan va, don vi, doan thi
sach vu » sach va, sach tu, sach uu
cua tre » cua te, cuu tre, cua triet
dang xa » dang xay, lang xa, dang ha
vu dang » su dang, vu quang, cua dang
dan vi » don vi, dan va, gan vi

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 van ((chat xuc) or (cam xuc)) va ((dan vi) OR (doan vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu dang xa hoi. hieu van ((chat xuc) OR (cam xuc)) va ((dan vi) OR (doan vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu dang xa hoi. hieu van ((chat xuc) or (cam xuc)) va ((dan vi) OR (doan vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach vu dang xa hoi. hieu van ((chat xuc) or (cam xuc)) va ((dan vi) OR (doan vi)) cua tre*.