Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, don thuoc, dong thuc
dang thuoc » dung thuoc
thanh phan » thanh pho, thanh san, thanh toan
hoc nganh » hoc nhanh
ban thanh » ban hanh, ban hang
sach doi » sach hoi, sach moi, sach dao
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
tu sach » thu sach, su sach, te sach
doi dap » hoi dap, doi dau, do dap
hoi ban » hoi dan, hoi bai, doi ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach doi dap, nghien cuu cong hoc nganh ((dong thuoc) OR (dang thuoc)) xa hoi ban thanh phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach doi dap, nghien cuu cong hoc nganh ((dong thuoc) OR (dang thuoc)) xa hoi ban thanh phan".
• Adding a wildcard symbol may retrieve word variants: tu sach doi dap, nghien cuu cong hoc nganh ((dong thuoc) OR (dang thuoc)) xa hoi ban thanh phan*.