Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hanh thoi » hanh thuoc, nhanh thai, hanh noi
hoc doanh » hoa doanh, hoc danh, hoc dan
thoi dap » hoi dap, thoi dai, thi dap
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa 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
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 hoc doanh khoa ((hoc xa) OR (hoc ma)) hai van nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuc hanh thoi dap, nghien cuu toan hoc doanh khoa ((hoc xa) OR (hoc ma)) hai van nhan dan".
• Adding a wildcard symbol may retrieve word variants: thuc hanh thoi dap, nghien cuu toan hoc doanh khoa ((hoc xa) OR (hoc ma)) hai van nhan dan*.