Improve full-text search results

This issues materializes a brainstorming process.

Use cases / examples

... list here what's problematic with current search, and explain what was expected ...

• I searched for spaghetti

  • 3 first search results are ...
  • I expected ...

• I searched for ECB

  • I thought to find ECB provider in the top of the results list but I only found plenty of ECB's datasets

@thomasbrand and @vermandel could be helpful with that task.

Tasks

How to implement the listed examples above will be decided later.

What to change in Solr schema, indexation script...