Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
nganh ky » nganh y, nganh xay, hanh ky
van hanh » van thanh, ban hanh, van anh
so nganh » so ngan, hoc nganh, moi nganh
hieu van » thien van, lieu va, hieu ve
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
va cau » van cau, va cac, va dau
bac du » cac du, bac tu, tac du

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