Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua viet » ca viet, hoa viet, cua vat
va triet » va thiet, va trien, ve triet
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
hanh va » hang va, hanh vi
va nham » va cham, va tham, va nha
hieu va » lieu va, hieu qua
may hoi » may thoi, tay hoi, mai hoi
sac ky » sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (cac ky)) mang may hoi. hieu va nham thuc ban hanh va ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) mang may hoi. hieu va nham thuc ban hanh va ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) mang may hoi. hieu va nham thuc ban hanh va ((va triet) or (cua viet))*.