Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
hanh di » hanh de, hang di, danh di
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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: so sach ty nang xa hoi. ((hieu ve) OR (hieu va)) cao duc va ((hanh di) OR (hanh vi)) cua te~.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. ((hieu ve) or (hieu va)) cao duc va ((hanh di) or (hanh vi)) cua te*.