Perhaps you should try some spelling variations:
so nganh » so ngan, hoc nganh, moi nganh
ban hanh » ban hang
dang xay » dang van, van xay
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
va dan » ca dan, va dao, va dau
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 xa) or (dang xay)) hoi. hieu ve cac duc ((ban hanh) or (va dan)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so nganh y ((nang xa) OR (dang xay)) hoi. hieu ve cac duc ((ban hanh) OR (va dan)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so nganh y ((nang xa) or (dang xay)) hoi. hieu ve cac duc ((ban hanh) or (va dan)) vi cua tre*.