Perhaps you should try some spelling variations:
28electronic computers » electronics computers, electronic computer, optoelectronic computers
programming languages » program language
programming language » program language
electronic computers » electronic commerce
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: %((programming languages) OR (programming language)) %((28electronic computers) OR (electronic computers))%29 %2f syntax%22.
• Adding a wildcard symbol may retrieve word variants: %((programming languages) or (programming language)) %((28electronic computers) or (electronic computers))%29 %2f syntax%22*.