Perhaps you should try some spelling variations:
ban dinh » ban tinh, van dinh, ban dich
so sach » so sanh, bo sach, co sach
dinh vi » dinh ve, dinh viet, dinh tri
thu ban » thu hang
van hac » van hoc, van hai, van chat
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van ha » van hoa, van chat, van hanh
vi cua » vai cua, di cua
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 y ((nang xa) or (nang ma)) hoi. hieu ((van hac) or (van ha)) thu ban dinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang xa) OR (nang ma)) hoi. hieu ((van hac) OR (van ha)) thu ban dinh vi cua te.
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) or (nang ma)) hoi. hieu ((van hac) or (van ha)) thu ban dinh vi cua te*.