Talvez debería tentar con algunhas variantes ortográficas:
introduction conventional » introduction international, introduction conceptual, introduction regional
programming defining » programming designing, programming learning, programming reasoning
programming session » programming series, programming service, programs session
basic teens » basics teens, basic tenets, basic trends

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: introduction conventional ((programming session) OR (programming defining)) basic teens~.
• Adding a wildcard symbol may retrieve word variants: introduction conventional ((programming session) or (programming defining)) basic teens*.