Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
thanh va » thanh van, hanh va, thanh ha
sach ky » sac ky, sach y, sach ty
cam thu » nam thu, cac thu, ca thu
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam thu) or (am thuc)) ban thanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam thu) OR (am thuc)) ban thanh va va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam thu) or (am thuc)) ban thanh va va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang x)) hoi. hieu ve ((cam thu) or (am thuc)) ban thanh va va triet*.