Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
dan de » dan den, dang de, van de
de su » den su, ve su, de tu

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 ((sang ma) or (mang may)) hoi. ((hieu va) OR (hieu qua)) cam tuc va dan de su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((sang ma) OR (mang may)) hoi. ((hieu va) OR (hieu qua)) cam tuc va dan de su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((sang ma) or (mang may)) hoi. ((hieu va) OR (hieu qua)) cam tuc va dan de su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((sang ma) or (mang may)) hoi. ((hieu va) OR (hieu qua)) cam tuc va dan de su triet*.