Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
luat nganh » luat ngan, thuat nganh, luat doanh
nganh khoa » nganh hoa, nganh khong, doanh khoa
cach thoi » cac thoi, cach thuc, cach noi
cong luat » cong suat, cong luan, cuong luan
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
hoi van » hoi va, hoi dan, hai van
ma hoi » mai hoi, xa hoi, ma hoa

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 (cach thoi)) tap, nghien cua cong luat nganh khoa hoc ma hoi van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (cach thoi)) tap, nghien cua cong luat nganh khoa hoc ma hoi van thanh van.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (cach thoi)) tap, nghien cua cong luat nganh khoa hoc ma hoi van thanh van*.