Service order search based on IBASE is not working

Hi All,

I am facing one Issue in CRM web ui..when we search service order based on the referenced installed base id it's not returning the proper result..if we have multiple service orders for the IBASE id it's returning only few values some times even though if we have service order associated with IBASE id it's not returning any value..

I am guessing it's returning wrong result..

I wanted to check which logic has been written for this search result or is it using any search help table.. Could you please help me where we can find the logic written for this search criteria..

Please find the screen shot for your reference..I appreciate your help in advance..

Thanks,

Susan.