Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
khoa nganh » khoi nganh, hoc nganh
nganh khoa » nganh hoa, nganh khong, doanh khoa
mach hoc » cach hoc, dich hoc, anh hoc
cua toan » cuu toan, xuan toan, cua thanh
khoa hoc » hoa hoc
phan tan » phan van, phan lan, pha tan
phan tap » phan lap, han tap, pha tap
tu mach » tu cach, tu manh, tu hach
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 mach hoc tap, nghien cua toan khoa nganh khoa hoc xa hoi va ((phan tan) OR (phan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cua toan khoa nganh khoa hoc xa hoi va ((phan tan) OR (phan tap))".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cua toan khoa nganh khoa hoc xa hoi va ((phan tan) OR (phan tap))*.