Perhaps you should try some spelling variations:
bo sach » co sach, hoc sach
minh vi » minh voi, dinh vi, minh va
xuc van » duc van, luc van, vuc van
va tham » van tham, va cham, va thanh
va kham » va cham, va khao, vu kham
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach y ((nang xa) or (lang xa)) hoi. hieu ((va kham) OR (va tham)) xuc van minh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y ((nang xa) OR (lang xa)) hoi. hieu ((va kham) OR (va tham)) xuc van minh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach y ((nang xa) or (lang xa)) hoi. hieu ((va kham) OR (va tham)) xuc van minh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: bo sach y ((nang xa) or (lang xa)) hoi. hieu ((va kham) OR (va tham)) xuc van minh vi cua tre*.