Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
y nang » ky nang, ly nang, v nang
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: ((so sach) or (bo sach)) y nang ma hoi. lieu va cac duc ban ((danh vi) or (dinh vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) y nang ma hoi. lieu va cac duc ban ((danh vi) OR (dinh vi)) su triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) y nang ma hoi. lieu va cac duc ban ((danh vi) or (dinh vi)) su triet*.