Perhaps you should try some spelling variations:
doanh khoa » toan khoa
luc doanh » muc doanh, luat doanh, luc canh
cach hoc » cach thuc, cach thoi, dich hoc
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
khoa hoc » hoa hoc
van gian » van giang, dan gian, van giao
tu cach » tu cac
va gian » va gianh, va giai, va gia
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 cach hoc tap, nghien cuu dong luc doanh khoa hoc xa hoi ((va gian) or (van gian)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien cuu dong luc doanh khoa hoc xa hoi ((va gian) OR (van gian)) dan.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cuu dong luc doanh khoa hoc xa hoi ((va gian) or (van gian)) dan*.