Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cua tre » cua te, cuu tre, cua triet
dao vat » dao van, tao vat, dao va
nam xuc » cam xuc, nam xua, nam thuc
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
dang xa » dang xay, dang ha, dang va
xuc va » duc va, tuc va, luc va
va dao » ca dao
va nam » van nam, ha nam, va nay

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 ky ((dang xa) or (lang xa)) hoi. hieu va nam xuc va dao vat ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((dang xa) OR (lang xa)) hoi. hieu va nam xuc va dao vat ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang xa) or (lang xa)) hoi. hieu va nam xuc va dao vat ((cua tre) or (cau tren))*.