This commit tries to improve the search results by processing
the query and attempting progressively less restrictive searches
until a non-zero set of pages is matched.
The new procesing includes:
* stripping off quote marks, which were causing searches to fail
* first attempting to match pages where ALL the query terms exist
* second attempting to match pages where ANY of the query terms exist
* third attempting to match pages where the title contains partial word matches
The first query attempt approximates, quite well, the idea of searching
for multi-word phrases. This is given the technical nature of the terms
and the fairly small size of the corpus.
PR Close#41368
55f7f1d446