Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
hoc pham » hoc phan, hoc phat, hoc phap
khoa hoc » hoa hoc
van nhan » van phan, van thanh, van khanh
su mach » su sach
hoc xa » hoc ma

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 pham khoa hoc xa hoi ((van nhan) OR (danh nhan)) dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su mach hoc tap, nghien cuu dong hoc pham khoa hoc xa hoi ((van nhan) OR (danh nhan)) dan".
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien cuu dong hoc pham khoa hoc xa hoi ((van nhan) OR (danh nhan)) dan*.