Perhaps you should try some spelling variations:
cuon sach » duong sach, co sach, nuoc sach
su triet » su viet, su tien, ve triet
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hang » van hang, va nang, va lang
hang ki » hang di, hang ke, hang vi
tuc va » thuc va, truc va, tuc xa
ki su » ky 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) or (cuoc cach)) ty nang xa hoi. ((hieu ve) or (hieu qua)) cam tuc va hang ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cuon sach) OR (cuoc cach)) ty nang xa hoi. ((hieu ve) OR (hieu qua)) cam tuc va hang ki su triet.
• Adding a wildcard symbol may retrieve word variants: ((cuon sach) or (cuoc cach)) ty nang xa hoi. ((hieu ve) or (hieu qua)) cam tuc va hang ki su triet*.