Perhaps you should try some spelling variations:
cach truc » cach thuc, sach truc, cau truc
cua viet » ca viet, hoa viet, cua vat
va triet » va thiet, va trien, ve triet
cham luc » cham soc, nhan luc, cham cuu
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
su cach » su sach, tu cach, su cac
hieu ve » hieu va, hieu van
nano o » nano cuo, nano mot, nano tio
luc va » duc va, tuc va, loc va

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