Perhaps you should try some spelling variations:
hoach hoc » hoach hoi, hoach hoa, hoa hoc
van thanh » van tuan
ban thanh » ban hanh, ban hang
huu toan » huu tuan, cuu toan, huy toan
khoa bia » khoa bim, khoa ma, keo bia
bia khoa » da khoa
khoa hoc » hoa 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: thu hoach hoc tap, nhiem huu toan khoa bia khoa hoc xa hoi ((van thanh) or (ban thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu hoach hoc tap, nhiem huu toan khoa bia khoa hoc xa hoi ((van thanh) OR (ban thanh)) van.
• Adding a wildcard symbol may retrieve word variants: thu hoach hoc tap, nhiem huu toan khoa bia khoa hoc xa hoi ((van thanh) or (ban thanh)) van*.