Configure to search with multiple words (AND, OR, NOT) including contextual search with relevance score

[ishanuda]

Hi,

I have an advanced search form having the following fields.

1. Three fields of AND
2. Three fields of OR
3. Three fields of NOT
4. Base keywords - Proximity search (NOTE: Probably I think this should be the contextual search)

Now I needed to find the settings/options to parse for searching content according to the form and given search params.
But I was unable to find clear instructions in the documentation of parsing all the search params when doing the search.

Would be a great help if someone can help me out with the configuration for a relevant particular search case.

i.e.

1. Search with AND, OR, NOT with multiple words,
2. The contextual search /Proximity search
3. Getting search relevance with a score

Thank you.