Perhaps you should try some spelling variations:
nganh xay » nganh mac, nganh y, nganh ma
so nganh » so ngan, hoc nganh, moi nganh
xay nang » may nang, day nang, xuan nang
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
vi cuu » vinh cuu
vi luu » vi lua

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