Perhaps you should try some spelling variations:
cua triet » va triet
cau thuc » cau truc, cuu thuc, can thuc
vat hanh » vat thanh, van hanh, va hanh
cua viet » ca viet, hoa viet, cua vat
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
hieu ke » hieu kem, chieu ke, hieu ky
cach y » cach _, cach 9, sach y
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ke cau » ket cau
cuoc » quoc, duoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: cuoc cach y nang ma hoi. hieu ke cau thuc vat hanh vi ((((cua triet) OR (cua viet))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuoc cach y nang ma hoi. hieu ke cau thuc vat hanh vi ((((cua triet) OR (cua viet))) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "cuoc cach y nang ma hoi. hieu ke cau thuc vat hanh vi ((((cua triet) OR (cua viet))) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: cuoc cach y nang ma hoi. hieu ke cau thuc vat hanh vi ((((cua triet) OR (cua viet))) or (su triet))*.