AFAICS tf(name, 'co') returns 0 on the {id:1, name:'Coca-Cola Company'}
because it does not support partial match.
tf(name, 'company') will return 1
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Add a function query boost that uses the term frequency, "tf":
bf=tf(name,'co') -- additive boost
boost=tf(name,'co') -- multiplicative boost
That does of course require that term frequency is not disabled for that
field in the schema.
You can multiply the term frequency as well in the fun
