Perhaps you should try some spelling variations:
canh thoi » cach thoi, hanh thoi, anh tho
hoc nganh » hoc nhanh
thu canh » thuc hanh, thu cong, thu ban
thoi dap » hoi dap, thoi dai, thi dap
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, tin hoc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
hai van » thai van, ha van, hai tan
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu canh thoi dap, nghien cuu toan hoc nganh ((khoa hoc) OR (hoa hoc)) xa hai van nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu canh thoi dap, nghien cuu toan hoc nganh ((khoa hoc) OR (hoa hoc)) xa hai van nhan dan".
• Adding a wildcard symbol may retrieve word variants: thu canh thoi dap, nghien cuu toan hoc nganh ((khoa hoc) OR (hoa hoc)) xa hai van nhan dan*.