Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
va triet » va thiet, va trien, ve triet
su cach » su sach, tu cach, su cac
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
1 ho » x ho, 1 ha, 1 h

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach ((tu nano) OR (truc nano)) 1 ho. hieu ve cham duc va hanh vi ((va triet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach ((tu nano) OR (truc nano)) 1 ho. hieu ve cham duc va hanh vi ((va triet) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cach ((tu nano) OR (truc nano)) 1 ho. hieu ve cham duc va hanh vi ((va triet) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: su cach ((tu nano) OR (truc nano)) 1 ho. hieu ve cham duc va hanh vi ((va triet) or (hoa viet))*.