Perhaps you should try some spelling variations:
22programming languages » 3.2programming languages, onprogramming language, progamming languages
28electronic computers » electronic computers, electronics computers, optoelectronic computers
programming languages » program language
programming language » program language
electronic computer » electronic computers, electronics computer, electronics computers
2 syntax » _ syntax, 3 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: %((((22programming languages) OR (programming languages))) OR (programming language)) %((28electronic computers) OR (electronic computer))%29 %2 syntax%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22programming languages) OR (programming languages))) or (programming language)) %((28electronic computers) or (electronic computer))%29 %2 syntax%22".
• Adding a wildcard symbol may retrieve word variants: %((((22programming languages) OR (programming languages))) or (programming language)) %((28electronic computers) or (electronic computer))%29 %2 syntax%22*.