What is the meaning of ‘Wild goose chase’ -

Wild goose chase (Phrase)
Meaning: A foolish and hopeless search for or pursuit of something unattainable.
Bangla meaning: অর্থহীন অভিযান, অনুসন্ধান ইত্যাদিতে নেমে পড়া।
Example Sentence: If we continue to believe that we need to find that one right person or that one wise individual, then we are stuck on a hopeless road of a wild goose chase.

Source: Oxford Dictionary & Bangla Academy Dictionary.