Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, nganh khong, doanh khoa
coc nganh » hoc nganh, cac nganh, chuc nganh
mach hoc » cach hoc, dich hoc, anh hoc
cac cong » cua cong
cong coc » cong cuoc, cong cac, cong co
hoc mai » hoc ma, hoc dai, hoc may
hoc bai » hoc dai, hoc giai
va luan » vay luan, van luan, va quan
tim » time

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tim mach hoc tap, nghien cac cong coc nganh khoa ((hoc mai) OR (hoc bai)) hoi va luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tim mach hoc tap, nghien cac cong coc nganh khoa ((hoc mai) OR (hoc bai)) hoi va luan van".
• Adding a wildcard symbol may retrieve word variants: tim mach hoc tap, nghien cac cong coc nganh khoa ((hoc mai) OR (hoc bai)) hoi va luan van*.