Custom Report Multiple selection in where clause

I am facing problem when i am selection multiple selection in where section
i have created custom field named Category i want to create a report to show data of only two categories . when i am selecting one category it showing data for that category but slecting two categories then showing blank report.


result image

when selecting one category


and result

Please help me anyone

All Where … terms are "and"ed.
What you want is “steel” or “Freight” which Managers custom report writer does not offer

See the first group of Notes in this Guide: Create custom reports | Manager.