Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
toc sach » hoc sach, doc sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoc toan » hoc tan, hop toan, hoa toan
toan hoa » toan khoa, toan hoat, toan hoc
va nhan » van nhan, ca nhan, va phan
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: toc sach hoc tap, nghien cuu cong hoc toan hoa hoc xa hoi ((va nhan) or (danh nhan)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach hoc tap, nghien cuu cong hoc toan hoa hoc xa hoi ((va nhan) OR (danh nhan)) dan.
• Adding a wildcard symbol may retrieve word variants: toc sach hoc tap, nghien cuu cong hoc toan hoa hoc xa hoi ((va nhan) or (danh nhan)) dan*.