If you want to add more attributes to global search apart from name and number then you need to add those attribute for object type in SearchableAttributesByType.properties file.
For example if you want to add IBA “colour” of WTPart in global search then you need to change below property in [Windchill_Home]\codebase\com\ptc\windchill\enterprise\search\server\SearchableAttributesByType.properties
keywordSearch.wt.part.WTPart=name,number,color
keywordSearch.wt.doc.WTDocument=number,name,attribute1,attribute2
Then use xconfmanager to propagete changes.
Hope this helps.