Perhaps you should try some spelling variations:
cac nganh » hoc nganh
nganh co » nganh cong, nganh hoa, nganh y
sanh dao » lanh dao, sach dao, hanh dao
dong khi » duong khi, cong khi, dong chi
dong thi » duong thi, dang thi, dong tai
so sanh » do sanh
vu cac » va cac, tu cac, ve cac

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu cac nganh co khi đong luc ) OR ( so sanh dao ((dong khi) OR (dong thi)) đong luc ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( vu cac nganh co khi đong luc ) or ( so sanh dao ((dong khi) OR (dong thi)) đong luc ))~".
• Adding a wildcard symbol may retrieve word variants: (( vu cac nganh co khi đong luc ) or ( so sanh dao ((dong khi) OR (dong thi)) đong luc ))*.