Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
cao hoi » cau hoi, co hoi, cao hoc
hieu le » hieu ve, hieu he, hieu ly
cua tre » cua te, cuu tre, dua tren
thuc va » thuc vat, thuc dan
hanh ve » hanh vi, hanh va, hanh kem
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cai ky nang cao hoi. hieu le nam ((thuc va) OR (thuc day)) hanh ve ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky nang cao hoi. hieu le nam ((thuc va) OR (thuc day)) hanh ve ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ky nang cao hoi. hieu le nam ((thuc va) OR (thuc day)) hanh ve ((cua tre) or (cua triet))*".