Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
cach hoc » cach thoi, dich hoc, cac hop
dan phan » doan phan, dan chan, van phan
phan van » pham van, thanh van, luan van
hoc tan » hoc tang, hoc dan, hoc tap
tan hoa » van hoa, tap hoa, tan ha
hoi dan » hoa dan, hoc dan, hoi dap
mo hoc » mon hoc, co hoc
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: ve ((cach hoc) or (cach thuc)) tap, nghien cuu mo hoc tan hoa hoc xa hoi dan phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ve ((cach hoc) OR (cach thuc)) tap, nghien cuu mo hoc tan hoa hoc xa hoi dan phan van.
• Adding a wildcard symbol may retrieve word variants: ve ((cach hoc) or (cach thuc)) tap, nghien cuu mo hoc tan hoa hoc xa hoi dan phan van*.