When filtering for source or target text in the Editors, there aren't specific filters for example for "does not contain" or "is equal to", "begins with", etc.
Use the Editor for Desktop and apply some regexps to manually create similar filters to search for desired strings.
Introduce new filters which allow searching text strings based on the following criteria:
- Does not contain
- Begins with
- Ends with
- Does not end with
- Does not Begin with
This would allow having a more refined search and avoid the need for knowing regexps/downloading the Editor for Desktop.