Live search app with php

I have a student live search app, when I search for a class in the text field If I type slowly it would work fine and just bring me that class, but when I type to fast it brings other classes which do not match with the text field. Is that an sql timeout problem? How do I solve this bug? I olso have some ”sql update” code, before the sql for updating db worked fine but not anymore. My data has been bigger over time, is that olso sql timeout problem?

Appreciate any help.

To better help you then showing the relevant code would be helpful, plus how you have your database setup would add to the help.

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