Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
ban hanh » ban hang
so nganh » so ngan, hoc nganh, moi nganh
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
ve cac » va cac, vien cac

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 ma) or (dang xay)) hoi. hieu ve cac duc ((ban hanh) or (va hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so nganh y ((nang ma) OR (dang xay)) hoi. hieu ve cac duc ((ban hanh) OR (va hanh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: so nganh y ((nang ma) or (dang xay)) hoi. hieu ve cac duc ((ban hanh) or (va hanh)) vi cua triet*.