Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
cac toi » cac thoi
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
cac toc » cac nuoc, cac thoi
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky tang xa hoi. hieu vien ((cac toc) or (cac toi)) ban ((hanh di) OR (hanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky tang xa hoi. hieu vien ((cac toc) OR (cac toi)) ban ((hanh di) OR (hanh de)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky tang xa hoi. hieu vien ((cac toc) or (cac toi)) ban ((hanh di) OR (hanh de)) cua triet".
• Adding a wildcard symbol may retrieve word variants: so sanh ky tang xa hoi. hieu vien ((cac toc) or (cac toi)) ban ((hanh di) OR (hanh de)) cua triet*.