From Palette Settings view you can set preferences for component searching from the Palette and even from the component list that appears on the design workspace when adding a component without using the Palette.
From the menu bar, click Window > Preferences to display the [Preferences] dialog box.
Expand the Talend node and click Palette Settings to display the Palette Settings view.
To limit number of components that can be displayed on the Recently Used list, enter your preferred number in the Recently used list size field.
To enable searching a component using a phrase that describes the function or purpose of the component as search keywords in the search field of the Palette or in the text field that appears on the design workspace, select the Also search from Help when performing a component searching check box. With this check box selected, you can find your component on the Palette or on the component list on the design workspace as long as you can find it from the F1 Help information by using the same descriptive phrase as keywords.
To change the number of the search result entries when using a descriptive phrase as search keywords, enter your preferred number in the Result limitation from Help field.