Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
khong hoc » thong hoc, khong thuoc, khong chuc
khung hoc » chung hoc, nhung hoc, thuong hoc
dan thanh » dang thanh, danh thanh, ban thanh
hoc phan » hoc dan, hoc pho
anh hoc » sinh hoc, benh hoc, hinh hoc
mai hoi » mai khoi, dai hoi, lai hoi
hoi dan » hoa dan, hoc dan, hoi dap
tu anh » tu hanh, tu manh, thu anh
mo hoc » mon hoc, co hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu anh hoc tap, nghien cuu mo hoc phan ((khong hoc) or (khung hoc)) mai hoi dan thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu anh hoc tap, nghien cuu mo hoc phan ((khong hoc) OR (khung hoc)) mai hoi dan thanh phan.
• Adding a wildcard symbol may retrieve word variants: tu anh hoc tap, nghien cuu mo hoc phan ((khong hoc) or (khung hoc)) mai hoi dan thanh phan*.