Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh hoan » doanh doanh, doanh khoa, doanh nhan
cach thoi » cac thoi, cach thuc, cach noi
hoc doanh » hoa doanh, hoc danh, hoc dan
thoi tap » toi tap, hoc tap, thoi dai
cong hoc » dong hoc, cong hoa, cong coc
hoan hoc » hoa hoc, toan hoc, hoang hoa
te cach » ve cach, te sach, tu cach
hoc bai » hoc dai, hoc giai
hoi van » hoi dan, hai van, hoi han

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach thoi tap, nghien cua cong hoc doanh hoan hoc bai ((hoi van) OR (hoi va)) luan van~".
• Adding a wildcard symbol may retrieve word variants: te cach thoi tap, nghien cua cong hoc doanh hoan hoc bai ((hoi van) OR (hoi va)) luan van*.