Expand your free text search with an asterisk (*) at the end of the keyword to include different endings of the current keyword. For example, the search laddst* gives hits on charging post, charging posts, charging station, etc.
Searching with different filters (eg categories and licenses) creates an AND between the filters.
Searching with multiple options within a filter (eg multiple formats) creates an OR between the options.
Sorting of search results based on "Relevance" - the search term is matched against the title
Sorting of search results based on "Last modified" - last modified metadata is displayed. Note that this does not necessarily mean that the data set is up to date.

What do the filters mean?

Licence - Licence is rules for how a dataset can be used
Open data - Data sets that are public and freely accessible to the public. Registration requirements for API keys may apply.
Protected data - Data sets that need to be shared in a controlled manner due to different protection needs. Restricted data sets have different terms of use, such as fees or confidentiality agreements. Non-public data sets are not available to the public due to privacy, security, or other reasons.
Categories - Thematic categorisation from the European data portal www.data.europa.eu
High value datasets - EU-designated datasets considered particularly valuable for society and regulated in a implementing regulation
Follows specification - Filters out datasets that follow a specification or a implementing regulation
Organisation type - Makes it possible to filter datasets from one or several types of organisations
Organisations - Makes it possible to search for datasets from a single organisation directly
Format - Format that the dataset is available in for use
Update frequency - How often the dataset is updated
API/Data service - Filters out datasets that are distributed with an API or data service