Perhaps you should try some spelling variations:
ban thanh » ban hanh
ban hang » ngan 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
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
cua tu » cua tuc, cua su, cua cu

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 cam duc ((ban thanh) or (ban hang)) vai ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. lieu va cam duc ((ban thanh) OR (ban hang)) vai ((cua tre) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. lieu va cam duc ((ban thanh) or (ban hang)) vai ((cua tre) or (cua tu))*.