Perhaps you should try some spelling variations:
cac nganh » hoc nganh
nganh xay » nganh mac, nganh y, nganh ma
danh may » hanh may, mang may, danh bat
su sach » vu sach
so sach » so sanh, bo sach, co sach
may khi » may thi, my khi, may khoa
xay thi » day thi, may thi, lay thai

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: (( ((su sach) OR (so sach)) danh may khi đong luc ) OR ( tu cac nganh xay thi đong luc ))~.
• Adding a wildcard symbol may retrieve word variants: (( ((su sach) or (so sach)) danh may khi đong luc ) or ( tu cac nganh xay thi đong luc ))*.