Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
cong luat » cong suat, cong luan, cuong luan
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
cac thu » cach thuc, cac thoi
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
hoi van » hoi va, hoi dan, hai van
nhan va » nhan tai, nhan dan, nhan tao

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) or (cac thu)) tap, nghien cua cong luat doanh khoa hoc mai hoi van nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (cac thu)) tap, nghien cua cong luat doanh khoa hoc mai hoi van nhan va.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (cac thu)) tap, nghien cua cong luat doanh khoa hoc mai hoi van nhan va*.