Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
than khoa » toan khoa, nhan khoa, thai khoa
thanh van » thanh san, thanh toan, thanh phan
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
sach hoc » cach hoc, mach hoc, sach duoc
khoa hoc » hoa hoc
so than » so phan, so thao, so tan
hai ban » hai bang, hai ba, tai ban
cong so » cong san, cong hoa
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach hoc) or (sach hoi)) tap, nghien cuu cong so than khoa hoc xa hai ban thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach hoc) OR (sach hoi)) tap, nghien cuu cong so than khoa hoc xa hai ban thanh van.
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach hoc) or (sach hoi)) tap, nghien cuu cong so than khoa hoc xa hai ban thanh van*.