Out of the box vTiger does not have an option to change the Global Search Result Columns/Fields in the User Interface, however there’s a way around. Basically – you need to create a vTiger filter and specify the columns you want to see. Note, the filter does not have to be set as default, but has to be public. In addition, in order for it to work, you will have to create filters for all the modules you want to use in the search, in other words, the filter you create will be used to display search results, and if the filter does not exist, it will not show any results, so again each module that you want included in the search should the the filter created. The filter name should be the same for all modules.
Once you have the filters created, the next step is to specify which filter will be used in vTiger Global Search Results.
Go to “/vtigercrm/modules/Home/“
Open “UnifiedSearch.php” with your favorite text editor
Go to line 83 and find the test string ‘viewname=’All’
‘All’ is the standard vTiger filter, so you need to change ‘All’ to ‘YourNewFilterName’, in this case it’s ‘MyFilter’
Save the file
Use the vTiger Global Search and you will see that the column/fields have changed to the ones you specified in the custom filter.