Perhaps you should try some spelling variations:
chat xuc » chat huu, chao xu, chat cua
te sach » toc sach
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
su dang » su dung
vu dang » vu quang, cua dang
cua tre » cua te, cuu tre, cua triet
va dau » va dao
dau vi » dau ve, dau va, dat vi
vi cua » vai cua, di 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 ((vu dang) OR (su dang)) xay hoi. hieu va ((chat xuc) or (cam xuc)) va dau vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((vu dang) OR (su dang)) xay hoi. hieu va ((chat xuc) OR (cam xuc)) va dau vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((vu dang) OR (su dang)) xay hoi. hieu va ((chat xuc) or (cam xuc)) va dau vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((vu dang) OR (su dang)) xay hoi. hieu va ((chat xuc) or (cam xuc)) va dau vi cua tre*.