Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
canh thoi » cach thoi, hanh thoi, anh thi
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
phan dan » phan dang, phan dau, nhan dan
anh tho » anh khoa, anh thuc
mot hoc » mon hoc, mo hoc, mot goc
va phan » van phan, va phat, va phap
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 dan khoa hoc xa hoi va phan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((canh thoi) OR (anh tho)) dap, nghien cua mot hoc dan khoa hoc xa hoi va phan dan".
• Adding a wildcard symbol may retrieve word variants: thu ((canh thoi) OR (anh tho)) dap, nghien cua mot hoc dan khoa hoc xa hoi va phan dan*.