Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoc doanh » hoa doanh, hoc danh, hoc dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoa benh » khoa benh, hoa binh, hoc benh
gian dan » gian lang
mot hoc » mon hoc, mo hoc, mot goc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: van dich hoc tap, nghien cua mot hoc doanh hoa hoc ma ((hoa benh) OR (kham benh)) gian dan~.
• Adding a wildcard symbol may retrieve word variants: van dich hoc tap, nghien cua mot hoc doanh hoa hoc ma ((hoa benh) or (kham benh)) gian dan*.