Perhaps you should try some spelling variations:
doanh khoa » toan khoa
thuc cach » thuoc sach, truoc cach, thuc hanh
cach thoi » cac thoi, cach thuc, cach noi
hoc doanh » hoa doanh, hoc danh, hoc dan
thoi dap » hoi dap, thoi dai, thi dap
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan tai » hang tai, van tai, toan tai
xua hai » qua hai, cua hai, xuan thai
mo hoc » mon hoc, co hoc
xa hai » xa thai, xa hoi, xa dai

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

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