Perhaps you should try some spelling variations:
22programming languagess » 3.2programming languages, programming language, onprogramming language
28electronic computers » electronic computers, electronic computer, optoelectronic computers
programming languages » program language
electronics computers » electronic computers, electronics computer, electronics chapter
2a syntax » a syntax, 2 syntax, la syntax
f syntax » _ syntax, 3 syntax, 2 syntax

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: %((22programming languagess) OR (programming languages)) %((28electronic computers) OR (electronics computers))%29 %((2a syntax) OR (f syntax))%22.
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