Dolphin file name search syntax

[marc]

I just tried a search via dolphin. Right-click folder/Open with/Search 
for files. Fine.

But what is the syntax for file name searching?

When I to search for, say, "agile" in a file title, I must put "*agile*". 
That works.

But say I want to search for "agile software"?

I've tried everything I can thing of, but no joy. It would help to know 
the syntax!

Interestingly, "*agile*s*" will throw out all as you would expect, but 
add the o, "*agile*so*" and it finds nothing.

I'vve tried regex - why can't it use regex? - but that doesn't work 
either.

Worse to come: you can't sort the results.

-- 
Best,
Marc