Perhaps you should try some spelling variations:
thuoc mach » thuoc sach, thuong mach, thuoc ma
nghien cua » nghien cuu, nghiep cua, nghiep vua
pham khong » pham hong, pham thuong, pham chuong
gianh lang » gian lang, gian lan, nhanh lang
khoa pham » khoa kham, khoa phau, khoa cham
khong hoc » khung hoc, thong hoc, khong thuoc
dinh lang » dinh long, dinh rang, dinh quang
mach hoc » cach hoc, dich hoc, anh hoc
cua toan » cuu toan, xuan toan, cua thanh
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: "thuoc mach hoc tap, nghien cua toan khoa pham khong hoc xa hoi va ((gianh lang) OR (dinh lang))~".
• Adding a wildcard symbol may retrieve word variants: thuoc mach hoc tap, nghien cua toan khoa pham khong hoc xa hoi va ((gianh lang) OR (dinh lang))*.