Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
moi nganh » khoi nganh, hoc nganh, moi ngay
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
so nganh » so ngan, hoc nganh, doi nganh
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
va dinh » van dinh, va kinh, va tinh
van cac » van hac, van cau, van bac
vi cau » va cau, ve cau, di cau

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