Minimum word length in search field - find two character words

[Werner Pilnei]

I need to find words like 'Au' or 'Öd' (which are the names of small villages in Germany), but the standard requires a minimum of 3 characters in the search field. I changed the mysql.cnf setting to

innodb_ft_min_token_size=2
ft_min_word_len=2

but with no luck finding them via Search Engine. Any idea where to tweak ?
Thanx

 

[Werner Pilnei]

Found it - reading the docs is almost every time helpful. It is in the 'requirements array'

// Currently the requirements array only holds the query min length argument.
    'requirements' => [
        'query_min_length' => 3,
    ],