To improve your patent search I listed some helpful best practises here.

Further resources
Here find some more links:
The european Patent office offers a wide range of helpful information about patent search:
Search tools presentations from the EPO
https://www.epo.org/learning-events/materials/kit/download.html
FAQ Espacenet:
https://worldwide.espacenet.com/help?locale=de_EP&method=handleHelpTopic&topic=faqsearching
If you want to dive deeper in the strategy of patent search check out these freely accessible papers:
https://www.sciencedirect.com/science/article/pii/S017221901630103X
Strategies for effective searching:
https://www.sciencedirect.com/science/article/pii/S0172219016301144
Farewell
Now you should be ready to do your first Patent search with a lot of knowledge already! Find the full video courses downwards on this page! I would really like if you would support me by subscribing! There we also do a live screencast with an example search! We will use everything we learned!