Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
ca trung » cua trung, cac trung, cao trung
trung va » truong va, trang va, trung ha
so sanh » do sanh
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
so sach » bo sach, co sach, hoc sach
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
qua ca » qua cac, qua cua, qua cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) y nang ma hoi. hieu qua ca trung va hanh vi ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) y nang ma hoi. hieu qua ca trung va hanh vi ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) y nang ma hoi. hieu qua ca trung va hanh vi ((cua triet) or (cua viet))*.