Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
su triet » su viet, su tien
ve triet » va trien
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
ty nang » ky nang, ty xang, ty hang
cam tuc » cam xuc, cam tu, nam thuc
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty nang xa hoi. ((hieu ve) or (hieu qua)) cam tuc va hang di ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty nang xa hoi. ((hieu ve) OR (hieu qua)) cam tuc va hang di ((su triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang xa hoi. ((hieu ve) or (hieu qua)) cam tuc va hang di ((su triet) or (ve triet))*.