Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac duc » cac du, cac dac, cac nuoc
cao duc » dao duc, cao suc, giao duc
hanh va » hang va, hanh vi
cua tre » cuu tre, cua triet, dua tren
cua te » cua 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 ky nang xa hoi. lieu va ((cac duc) or (cao duc)) ban hanh va ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. lieu va ((cac duc) OR (cao duc)) ban hanh va ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. lieu va ((cac duc) or (cao duc)) ban hanh va ((cua tre) or (cua te))*.