Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thien van » thi van
van hanh » van thanh, ban hanh, van anh
so nganh » so ngan, hoc nganh, moi nganh
hieu van » hieu va, lieu va, hieu ve
nang xa » nang x, lang xa, nang ma
va hanh » va thanh, va danh, ban hanh
y nang » ky nang, ly nang, v nang
ve cau » ke cau, va cau, ve cac
cau du » cau do, cac du, cau tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so nganh y nang xa hoi. ((hieu van) OR (thien van)) cau du ((van hanh) or (va hanh)) ve cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so nganh y nang xa hoi. ((hieu van) OR (thien van)) cau du ((van hanh) OR (va hanh)) ve cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so nganh y nang xa hoi. ((hieu van) OR (thien van)) cau du ((van hanh) or (va hanh)) ve cau triet".
• Adding a wildcard symbol may retrieve word variants: so nganh y nang xa hoi. ((hieu van) OR (thien van)) cau du ((van hanh) or (va hanh)) ve cau triet*.