Perhaps you should try some spelling variations:
hieu vao » hieu van, chieu cao, hieu thao
chat tuc » chat xuc, luat tuc, chat huu
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
dao voi » dao noi, do voi, tao voi
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
tu dang » thu dang, tu dong, su dang
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
da voi » dua voi, ba voi, do voi

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 tu dang xa hoi. ((hieu vao) or (hieu va)) chat tuc va ((dao voi) OR (da voi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu dang xa hoi. ((hieu vao) OR (hieu va)) chat tuc va ((dao voi) OR (da voi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu dang xa hoi. ((hieu vao) or (hieu va)) chat tuc va ((dao voi) OR (da voi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu dang xa hoi. ((hieu vao) or (hieu va)) chat tuc va ((dao voi) OR (da voi)) cuu tre*.