Perhaps you should try some spelling variations:
nganh dong » nganh cong, nhanh dong, nganh nong
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc nganh » hoc nhanh
thuoc ma » hoc ma, duoc ma
nhan dan » phan dau, gian dan, nhan tai
su sach » so sach, vu sach
moi dap » hoi dap, doi dap, moi dan
hoi dan » hoa dan, hoc dan, hoi dap
va nhan » van nhan, ca nhan, va phan
cuu co » huu co, cua co, cuu mo
ma hoi » mai hoi, xa hoi, ma 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 sach ((moi dap) or (hoi dan)), nghien cuu co hoc nganh dong thuoc ma hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((moi dap) OR (hoi dan)), nghien cuu co hoc nganh dong thuoc ma hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: su sach ((moi dap) or (hoi dan)), nghien cuu co hoc nganh dong thuoc ma hoi va nhan dan*.