From Longman Dictionary of Contemporary Englishcast/spread your net widecast/spread your net wideto consider or try as many things as possible in order to find what you want Record companies are casting their nets wide in search of new talent. → net
Examples from the Corpus
cast/spread your net wide• Later that afternoon the police, who had been diligently searching certain caravans on Turpin's Field, spread their net wider.• Furse spread his net wide, but it did not sink deep.• I cast my net wide enough to find parents who vary from house cleaner to fashion designer to electrician to corporate manager.• It was argued in Chapter 2 that the criminal law ought to spread its net wider where the potential harm is greater.• We cast our net wider and in a different direction. 