Perhaps you should try some spelling variations:
doanh khoa » toan khoa
cuu chong » cuu cong, cuu phong, cuu phuong
chong hoc » chung hoc, chong doc, thong hoc
hoc doanh » hoa doanh, hoc danh, hoc dan
khoa hoc » hoa hoc
so sanh » do sanh
co sach » bo sach, cuon sach, hoc sach
van tai » von tai, van tuan
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: ((so sanh) or (co sach)) hoc tap, nghien cuu chong hoc doanh khoa hoc xa hoi va van tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (co sach)) hoc tap, nghien cuu chong hoc doanh khoa hoc xa hoi va van tai.
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (co sach)) hoc tap, nghien cuu chong hoc doanh khoa hoc xa hoi va van tai*.