Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cau thuc » cau truc, cuu thuc, can thuc
va triet » va thiet, va trien, ve triet
thuc van » thuc vat, thuc dan, thuc va
hieu ve » hieu va, hieu van
long ha » dong ha, cong ha, dong hoa
hanh de » hanh kem
hanh ve » hanh vi, hanh va, hanh kem
sy long » sy luong, quy long
ve cau » ke cau, va cau, ve cac
ha hoi » hoa hoi, ha noi, xa hoi
sac sy » sac ky, bac sy
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac sy long ha hoi. hieu ve cau thuc van ((hanh de) or (hanh ve)) ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac sy long ha hoi. hieu ve cau thuc van ((hanh de) OR (hanh ve)) ((va triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: te sac sy long ha hoi. hieu ve cau thuc van ((hanh de) or (hanh ve)) ((va triet) or (su triet))*.