Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sac » thu sach, thu san, thu xac
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, tao duoc
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, dua tren
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang ma hoi. hieu va ((cao duc) or (giao duc)) va hanh ve ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang ma hoi. hieu va ((cao duc) OR (giao duc)) va hanh ve ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang ma hoi. hieu va ((cao duc) or (giao duc)) va hanh ve ((cua tre) or (cua triet))*.