Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
canh thoi » cach thoi, hanh thoi, anh tho
thu canh » thuc hanh, thu cong, thu ban
thoi dap » hoi dap, thoi dai, thi dap
hoc toan » hoc tan, hop toan, hoa toan
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
mot hoc » mon hoc, mo hoc, mot goc
hoi van » hoi va, hoi dan, hai van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu canh thoi dap, nghien cua mot hoc toan khoa ((hoc xa) or (hoc ma)) hoi van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu canh thoi dap, nghien cua mot hoc toan khoa ((hoc xa) OR (hoc ma)) hoi van nhan dan.
• Adding a wildcard symbol may retrieve word variants: thu canh thoi dap, nghien cua mot hoc toan khoa ((hoc xa) or (hoc ma)) hoi van nhan dan*.