Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
thuc va » thuc vat, thuc dan, thuc day
dao via » dao va, dao viet, dao giao
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
qua am » quan am, qua ap, cua am
va dao » ca dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((lang xa) or (van xay)) hoi. hieu qua am thuc va dao via ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((lang xa) OR (van xay)) hoi. hieu qua am thuc va dao via ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ty ((lang xa) or (van xay)) hoi. hieu qua am thuc va dao via ((cua tre) or (cuu tre))*.