Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
cac tac » cac toc, cac bac, cac dac
vai cua » hai cua, lai cua, bai cua
y lang » o lang, _ lang, tay lang
tac va » tac da, tac xa, tuc va
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 y lang xa hoi. hieu qua cac tac va dao ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu qua cac tac va dao ((vai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu qua cac tac va dao ((vai cua) or (dai cua)) tre*.