Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, dua tren
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
hieu le » hieu ve, hieu he, hieu ly
cao hoi » cau hoi, co hoi, cao hoc
cai ky » cao ky, cac ky, cam ky
le nam » ly nam, he nam, le na
tu cai » tu cac, tu can, tu bai

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 hanh) OR (va danh)) 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 hanh) OR (va danh)) 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 hanh) OR (va danh)) ve ((cua tre) or (cua triet))*".