Perhaps you should try some spelling variations:
doanh khoa » toan khoa
canh thoi » cach thoi, hanh thoi, anh tho
thu canh » thuc hanh, thu cong, thu ban
thoi dai » hoc dai, hoi dap, hoi dan
toan hoc » toan khoa, van hoc, hoa hoc
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
mon hoc » dong hoc
hoi van » hoi va, hoi dan, hai van
hoc xa » hoc ma

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 dai, nghien cuu ((mon hoc) or (toan hoc)) doanh khoa hoc xa hoi van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu canh thoi dai, nghien cuu ((mon hoc) OR (toan hoc)) doanh khoa hoc xa hoi van nhan dan.
• Adding a wildcard symbol may retrieve word variants: thu canh thoi dai, nghien cuu ((mon hoc) or (toan hoc)) doanh khoa hoc xa hoi van nhan dan*.