Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
dong hoa » dong hoc, dong co
cua tre » cua te, cuu tre, cua triet
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
so sach » bo sach, co sach, hoc sach
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky dong » ly dong, ky dang, ky cong
so sanh » do sanh
hieu tu » chieu tu, hieu tuc, hien tu
tu cam » tu cham, tu cac, tu nam

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)) ky dong hoa hoi. hieu tu cam xuc van hanh va ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky dong hoa hoi. hieu tu cam xuc van hanh va ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ky dong hoa hoi. hieu tu cam xuc van hanh va ((cua tre) or (su triet))*.