Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
canh thoi » cach thoi, hanh thoi, anh thi
hoc toan » hoc tan, hop toan, hoa toan
khoa hoc » hoa hoc
van phan » van phong, van thanh, luan phan
phan dan » phan dang, phan dau, nhan dan
anh tho » anh khoa, anh thuc
mot hoc » mon hoc, mo hoc, mot goc
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) or (anh tho)) dap, nghien cua mot hoc toan khoa hoc xa hoi van phan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((canh thoi) OR (anh tho)) dap, nghien cua mot hoc toan khoa hoc xa hoi van phan dan.
• Adding a wildcard symbol may retrieve word variants: thu ((canh thoi) or (anh tho)) dap, nghien cua mot hoc toan khoa hoc xa hoi van phan dan*.