Perhaps you should try some spelling variations:
hanh thoi » hanh thuoc, nhanh thai, hanh noi
dang khoa » dung khoa, hang khoa, dang khoi
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
hoc dang » hoc dan, hoc dung, hoc bang
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 dang khoa hoc ((xa thai) or (a thai)) danh nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuc hanh thoi dap, nghien cuu toan hoc dang 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 dang khoa hoc ((xa thai) or (a thai)) danh nhan dan*.