PubMedley

Enhance your search experience on PubMed with natural language searches. This tool converts what you write into advanced search syntax when applicable. It also gives you suggestions on all the search properties that you can use.

This tool also adds an export button to let you export all the results into an CSV containing the title, authors, links and abstracts.

Source code: https://github.com/quantleaf/pubmedley
Same thing but for
- Google Advanced search: https://microsoftedge.microsoft.com/addons/detail/edlianibenikkenfpdicfjlcfphfoppd
- Twitter Advanced search: https://microsoftedge.microsoft.com/addons/detail/ofgdhaliiiobbiiimfopojmejmcieggh