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