Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang ca » hang va, nang cao, hang tai
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
ca hoi » cau hoi, cua hoi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty hang ca hoi. hieu va cac duc va ((danh vi) or (dinh vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang ca hoi. hieu va cac duc va ((danh vi) OR (dinh vi)) su triet.
• Adding a wildcard symbol may retrieve word variants: te sach ty hang ca hoi. hieu va cac duc va ((danh vi) or (dinh vi)) su triet*.