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
khoa benh » hoa binh, chua benh, kham benh
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoa benh » hoa binh, hoc benh, hoa ben
nhan dan » phan dau, gian dan, nhan tai
te dich » ve dich, tam dich, tap dich
mot hoc » mon hoc, mo hoc, mot goc

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

• Performing a fuzzy search may retrieve terms with similar spellings: te dich hoc tap, nghien cua mot hoc doanh hoa hoc ma ((hoa benh) or (khoa benh)) nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te dich hoc tap, nghien cua mot hoc doanh hoa hoc ma ((hoa benh) OR (khoa benh)) nhan dan.
• Adding a wildcard symbol may retrieve word variants: te dich hoc tap, nghien cua mot hoc doanh hoa hoc ma ((hoa benh) or (khoa benh)) nhan dan*.