Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoa doanh » toan doanh, hoa dan
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoa » dong hoc, dong co
khoa hoc » hoa hoc
tu mach » tu cach, tu manh, tu hach
va nhan » van nhan, ca nhan, va nha
va phan » van phan, va phat, va phap
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: tu mach hoc tap, nghien cuu dong hoa doanh khoa hoc xa hoi ((va nhan) OR (va phan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu dong hoa doanh khoa hoc xa hoi ((va nhan) OR (va phan)) van".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu dong hoa doanh khoa hoc xa hoi ((va nhan) OR (va phan)) van*.