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In fleet number it's possible to use questionmark and asterisk (wildcards) besides any character.
For example, if '?8??' is looked for, all vehicles with four-character-long fleet number and the second character of '8' in it
will be displayed. For example, '1821', '2835' or '4894' would be found. If '1*' is to be found, all vehicles
with fleet number beginning by '1' will be found.
String (besides registration number) can be entered not only by wildcards (? a *), but also by exact phrases
entered in quotation marks ('). If string doesn't contain quotes and words are divided by space,
all records with word before space or word after space will be found.
In case that words are divided by plus (+), all records with word before plus and after the plus
will be found.
