Perhaps you should try some spelling variations:
nganh dang » ngan hang, nhan dang, nganh cong
dang thuoc » dung thuoc
hoc nganh » hoc nhanh
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
thuoc va » thuc va, thuoc ma, thuong va
nhan dan » phan dau, gian dan
nhan tai » hang tai, van tai, toan tai
kon anh » dong anh, hong anh, kon mach
anh hoc » sinh hoc, benh hoc, hinh hoc
va hoi » xa hoi, va hoc, va hoa
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: kon anh hoc tap, nghien cuu dong hoc nganh dang thuoc va hoi ca ((nhan dan) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: kon anh hoc tap, nghien cuu dong hoc nganh dang thuoc va hoi ca ((nhan dan) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: kon anh hoc tap, nghien cuu dong hoc nganh dang thuoc va hoi ca ((nhan dan) or (nhan tai))*.