Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
sach hoi » sach doi, sach moi, cach thoi
hoc phan » hoc dan
phoi hoc » hoi hoc, phoi thuoc, hoa hoc
te sach » toc sach
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: te sach hoi dap, nghien cuu mo ((hoc phan) OR (hoc pho)) phoi hoc xa hoi van thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi dap, nghien cuu mo ((hoc phan) OR (hoc pho)) phoi hoc xa hoi van thanh van".
• Adding a wildcard symbol may retrieve word variants: te sach hoi dap, nghien cuu mo ((hoc phan) OR (hoc pho)) phoi hoc xa hoi van thanh van*.