Perhaps you should try some spelling variations:
duong doi » duong loi, dung doi, huong doi
xa duong » xa dong, va duong, xa muong
va triet » va thiet, va trien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cua tre » cua te, cuu tre, cua triet

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 ((van nam) or (van cau)) tuc xa duong doi ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu ((van nam) OR (van cau)) tuc xa duong doi ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ((van nam) or (van cau)) tuc xa duong doi ((cua tre) or (va triet))*.