seek a knot in a bulrush

To engage in a futile task; to try to find problems where none exist. A bulrush is a grassy plant that is not prone to knots. You'd have better luck seeking a knot in a bulrush than getting those flowers to grow on such rocky soil. I read the report so many times that the boss will be seeking a knot in a bulrush to try to find errors in it.

Common Names:

Name	Pronounced	Usage
Taniqua	tə-NEE-kwə	African American (Rare)
Basileios	-	Ancient Greek
Gwenfrewi	-	Welsh
Eva	E-vah (Spanish, Italian, Danish), EE-və (English), E-fah (German), AY-vah (Dutch)	Spanish, Italian, Portuguese, English, Czech, Slovak, German, Dutch, Swedish, Norwegian, Danish, Ice
Ball	[bɔ:l]
Dudu	-	Portuguese