Perhaps you should try some spelling variations:
nganh khang » nganh khong, ngan hang, nhanh thang
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
hoc nganh » hoc nhanh
kon mach » ke mach, ban mach
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
thuoc va » thuc va, thuoc ma, thuong va
hang tai » hang va
hoi cac » hoc cac, voi cac, hoa cac
va hoi » xa hoi, va hoc, va hoa

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

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