Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
khoa hoc » hoa hoc
hai danh » thai danh, hai dang, han danh
nhan dan » phan dau, gian dan, nhan tai
bo mach » bo sach, ban mach, bo trach
hoc lua » hoc luan, hoc luat, hoc cua
hai anh » ha anh, mai anh, hai thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo mach hoc tap, nghien cuu dong hoc nganh khoa hoc lua ((hai danh) or (hai anh)) nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo mach hoc tap, nghien cuu dong hoc nganh khoa hoc lua ((hai danh) OR (hai anh)) nhan dan.
• Adding a wildcard symbol may retrieve word variants: bo mach hoc tap, nghien cuu dong hoc nganh khoa hoc lua ((hai danh) or (hai anh)) nhan dan*.