Perhaps you should try some spelling variations:
christian literature » russian literature
asian literature » russian literature, italian literature, latin literature
towards serious » towards various, towards services, toward various
towards series » towards services, towards theories, towards service

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( christian literature towards serious ) OR ( asian literature towards series )).
• Adding a wildcard symbol may retrieve word variants: (( christian literature towards serious ) or ( asian literature towards series ))*.