Perhaps you should try some spelling variations:
nganh khang » nganh khong, ngan hang, nhanh thang
nghien thuy » nguyen thuy, nghiem thuc, nghiep thuc
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
thuy dung » thuy duong, thuoc dung, huy duong
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
tinh hoc » sinh hoc, tin hoc, hinh hoc
dung hoc » dong hoc, dung thuoc, trung hoc
thuoc va » thuc va, thuoc ma, thuong va
phap vat » phap luat, phap phat, phap viet
va phap » va phat, ban phap
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: su ((mach hoc) or (tinh hoc)) tap, nghien thuy dung hoc nganh khang thuoc va hoi va phap vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((mach hoc) OR (tinh hoc)) tap, nghien thuy dung hoc nganh khang thuoc va hoi va phap vat.
• Adding a wildcard symbol may retrieve word variants: su ((mach hoc) or (tinh hoc)) tap, nghien thuy dung hoc nganh khang thuoc va hoi va phap vat*.