Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
lieu van » hieu van, sieu van, lieu nano
sach le » cach le, sach de, sach lo
lang xa » lang ha, dang xay, lang van
cau duc » cao duc, cau luc, chu duc
dao vat » dao van, tao vat, dao va
vat cua » mat cua, bat cua, dat cua
cua tre » cua te, cuu tre, cua triet
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: tu ((sach le) or (sach doi)) lang xa hoi. ((lieu van) or (lieu va)) cau duc va dao vat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach le) OR (sach doi)) lang xa hoi. ((lieu van) OR (lieu va)) cau duc va dao vat cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach le) or (sach doi)) lang xa hoi. ((lieu van) or (lieu va)) cau duc va dao vat cua tre*.