Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
tu sach » thu sach, su sach, te sach
dao dai » dat dai, dao dan, tao dai
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
tang ma » mang may, tang van
tuc va » thuc va, truc va, tuc xa
va dao » ca dao
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((sang lap) OR (tang ma)) hai. ((hieu ve) OR (hieu va)) cam tuc va dao dai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((sang lap) or (tang ma)) hai. ((hieu ve) OR (hieu va)) cam tuc va dao dai cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((sang lap) or (tang ma)) hai. ((hieu ve) OR (hieu va)) cam tuc va dao dai cua te*.