Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, dong thuc
cach thoi » cac thoi, cach thuc, cach noi
hoc thanh » hoc nhanh, hoan thanh, hoc phan
don thuoc » dung thuoc, dang thuoc, doan phuoc
thu cach » thuc cach, thu canh, tu cach
thoi dap » hoi dap, thoi dai, thi dap
phap van » pham van, phan van, phap han
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va phap » va phat, ban phap
ma hoi » mai hoi, xa hoi, ma hoa

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "thu cach thoi dap, nghien cuu mon hoc thanh ((don thuoc) OR (dong thuoc)) ma hoi va phap van~".
• Adding a wildcard symbol may retrieve word variants: thu cach thoi dap, nghien cuu mon hoc thanh ((don thuoc) OR (dong thuoc)) ma hoi va phap van*.