Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
cham duc » pham duc, cham soc, pham duy
van cham » van chat, van tham, va cham
va hanh » van hanh, va thanh, va danh
su cach » su sach, tu cach, su cac
cach tu » cach thuc
tu nano » truc nano
1 ho » x ho, 1 ha, 1 so
1 h » 1 ha, 12 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 ((1 ho) or (1 h)). hieu van cham duc va hanh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach tu nano ((1 ho) OR (1 h)). hieu van cham duc va hanh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: su cach tu nano ((1 ho) or (1 h)). hieu van cham duc va hanh vi ((va triet) or (cua viet))*.