Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
mach hoc » cach hoc, dich hoc, anh hoc
dong hoc » dong luc
khoa hoc » hoa hoc
hoc danh » hoc dan, hoc anh, hoc hanh
su mach » su sach
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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

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