Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
cuu long » cuu cong, cuu tong, cuu nang
hoa toan » hoa tan, hop toan, hoach toan
hoa than » khoa than, hoa thanh, hoa thuan
khoa hoc » hoa hoc
su mach » su 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: su mach hoc tap, nghien cuu long ((hoa toan) OR (hoa than)) khoa hoc xa hoi van thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su mach hoc tap, nghien cuu long ((hoa toan) OR (hoa than)) khoa hoc xa hoi van thanh van".
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien cuu long ((hoa toan) OR (hoa than)) khoa hoc xa hoi van thanh van*.