Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua hai » qua hoat
qua cac » cua cac
va hanh » van hanh, va thanh, va danh
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: so sach ky nang xa hoi. hieu ((qua hai) or (qua cac)) duc va hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu ((qua hai) OR (qua cac)) duc va hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ((qua hai) or (qua cac)) duc va hanh vi ((cua tre) or (cua te))*.