Perhaps you should try some spelling variations:
doanh khoa » toan khoa
thuc cach » thuoc sach, truoc cach, thuc hanh
hoc doanh » hoa doanh, hoc danh, hoc dan
cach noi » cach thoi, hanh noi, anh noi
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
noi dap » hoi dap, noi da, doi dap
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
xa hai » xa thai, xua hai, 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 noi dap, nghien cuu mon hoc doanh khoa hoc ((xa hai) OR (xa hoi)) van nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuc cach noi dap, nghien cuu mon hoc doanh khoa hoc ((xa hai) OR (xa hoi)) van nhan dan".
• Adding a wildcard symbol may retrieve word variants: thuc cach noi dap, nghien cuu mon hoc doanh khoa hoc ((xa hai) OR (xa hoi)) van nhan dan*.