Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam tuc » cam xuc, nam thuc, dam thuc
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
y nang » ky nang, ly nang, v nang
cam tu » cam thu, nam tu, dam tu
di su » doi su, ki su, da su

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

• Performing a fuzzy search may retrieve terms with similar spellings: cuon sach y nang xa hoi. ((hieu ve) or (hieu qua)) ((cam tuc) OR (cam tu)) va hang di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuon sach y nang xa hoi. ((hieu ve) OR (hieu qua)) ((cam tuc) OR (cam tu)) va hang di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cuon sach y nang xa hoi. ((hieu ve) or (hieu qua)) ((cam tuc) OR (cam tu)) va hang di su triet".
• Adding a wildcard symbol may retrieve word variants: cuon sach y nang xa hoi. ((hieu ve) or (hieu qua)) ((cam tuc) OR (cam tu)) va hang di su triet*.