Hi,
Thank you for the details, it helped a lot.
There were a couple of minor issues with the configuration. First, I have disabled the exact matching, as it will override the keyword logic. Next, I have changed the search to the index table engine. The reason is, that the index table is far superior for exact word matching. With the regular engine there are limitations especially when words are surrounded dots, commas, parentheses etc..
This configuration should give you more consistent exact keyword matches. Please note that the description context may not be 100% accurate where the potential match was, but still the exact matches with this configuration are going to be on the top.
Now, in case of the keyword “search”, the only exact match is the first one, this one. Coming from this section ..trying to track down his father’s killer and thus returns anything that’s irrelevant to his search), the question of whether Kaito’s... Previously this wasn’t matched as the word in the sentence is “search)” ending in a parenthesis, which the index table trims and matches correctly.