Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nganh » hoc nhanh
thuoc va » thuoc ma, thuong va, thuoc tai
mach hoc » cach hoc, dich hoc, anh hoc
phap vat » phap luat, phap phat, phap viet
dung hoc » dong hoc, dung thuoc, trung hoc
huu dung » huu tung, huu quang, thuy dung
thuc va » thuc vat, thuc dan, thuc day
va phap » va phat, ban phap
su mach » su sach
hoa va » hoa van, hoa xa, hoa vo

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 tap, nghien huu dung hoc nganh khong ((thuoc va) OR (thuc va)) hoa va phap vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su mach hoc tap, nghien huu dung hoc nganh khong ((thuoc va) OR (thuc va)) hoa va phap vat".
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien huu dung hoc nganh khong ((thuoc va) OR (thuc va)) hoa va phap vat*.