Perhaps you should try some spelling variations:
28electronic computers » electronic computers, electronics computers, electronic computer
programs languages » programs language, problems languages, programming languages
2f syntax » 2 syntax, f syntax, 2a syntax

Try widening your search to All Fields.

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: %((programs languages) OR (program language)) %28electronic computers%29 %2f syntax%22.
• Adding a wildcard symbol may retrieve word variants: %((programs languages) or (program language)) %28electronic computers%29 %2f syntax%22*.