Perhaps you should try some spelling variations:
khoa doanh » hoa doanh, cho doanh, khoa dang
hanh thoi » hanh thuoc, nhanh thai, hanh noi
thoi dap » hoi dap, thoi dai, thi dap
cuu toan » cuu hoan, cua toan, huu toan
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
xua hai » qua hai, cua hai, xuan thai
xa hai » xa thai, xa hoi, xa dai
thuc » thu

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

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