Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
nganh dong » nganh cong, nhanh dong, nganh nong
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc nganh » hoc nhanh
gian lang » gian dan
mach hoc » cach hoc, anh hoc, bac hoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
thuoc va » thuc va, thuoc ma, thuong va
hoi dan » hoa dan, hoc dan, hoi dap
bo hoc » bao hoc, bot hoc, co hoc
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: tu ((mach hoc) or (dich hoc)) tap, nghien cua bo hoc nganh dong thuoc va hoi dan gian lang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (dich hoc)) tap, nghien cua bo hoc nganh dong thuoc va hoi dan gian lang.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (dich hoc)) tap, nghien cua bo hoc nganh dong thuoc va hoi dan gian lang*.