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
nhan dan » phan dau, gian dan
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
thoi dap » hoi dap, thoi dai, thi dap
mon hoc » toan hoc, dong hoc
hai van » thai van, ha van, hai tan
cuu mon » cuu mo, cuu mot, cuu cong
hoc xa » hoc ma
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: thuc cach thoi dap, nghien cuu mon hoc doanh khoa hoc xa hai van ((nhan dan) OR (nhan tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuc cach thoi dap, nghien cuu mon hoc doanh khoa hoc xa hai van ((nhan dan) OR (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: thuc cach thoi dap, nghien cuu mon hoc doanh khoa hoc xa hai van ((nhan dan) OR (nhan tai))*.