perform "OR" logic in search for particular field
I have a form which I use in find mode to search for particular sets of records. It has several fields and one of them is a checkbox set (3 checkboxes to choose).
I need to perform search using OR logic while checking these checkboxes.
E.g. I want to check first and third boxes and find all records which have first OR third options.
For now when I check first and third boxes it looks for records that have first AND third options simultaneously.