Perhaps you should try some spelling variations:
nghiem thuoc » nghiem duoc, nghiem hoa, nghi thuc
thuoc trong » thuc trong, hoc trong, thuat trong
nganh khoa » nganh hoa, nganh khong, doanh khoa
trong hoc » truong hoc, tuong hoc, thong hoc
hoc nganh » hoc nhanh
sach doi » sach hoi, sach dao, sach bai
sach moi » sach hoi, bach mai, sach bai
khoa hoc » hoa hoc
gian dan » gian lang
va gian » va gianh, van gian, va giai
hoc xa » hoc ma

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: "doc ((sach doi) OR (sach moi)) tap, nghiem thuoc trong hoc nganh khoa hoc xa hoi va gian dan~".
• Adding a wildcard symbol may retrieve word variants: doc ((sach doi) OR (sach moi)) tap, nghiem thuoc trong hoc nganh khoa hoc xa hoi va gian dan*.