If you are asking about Global Search it is already there where you can search any string to the entire application, But lets say you are asking an object(A single value can be an object) in a chart, yes you can search it in two type of charts one is table and second is pivot. If this is not what you are asking , Please explain in more detail so I can answer you properly.
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Have you ever used Global Search feature of Qlik Sense , I believe same option is available in Qlik View but in Qlik View search output will not give you charts associated to your search. Second if you are talking about any extension , please provide me the link so I can use it and tell you it can be possible in Qlik View ,If I am right you are trying to add any of the feature of Qlik Sense to Qlik View,Right?