Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve giau » ve giao, ve giai, de giau
qua ban » qua quan
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
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. hieu ve giau ((qua ban) or (cua ban)) hanh va ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ve giau ((qua ban) OR (cua ban)) hanh va ((cua tre) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ve giau ((qua ban) or (cua ban)) hanh va ((cua tre) or (cua tu))*.