why educated girls face the problem to find a life partner

I think that it is an interesting question that you pose. Education can mean that you set goals for your life, have ambitions etc. and that doesnt necessarily mean that you devote yourself to a life-partner and wish to act in a supporting role. I believe that society has conditioned many men to believe that they need to be the star in a relationship, the smart one and the decision maker. I hope it is changing - I'm old so may be there is hope for the future generation and expectations of equality will be the norm.

As a parent you put your best efforts in fiding life partner for your daughters. In the meantime, since they are educated, they will also find suitable partner for themsleves. For everything time has to come. When time comes, without your effort, the marriage is held. Just pray for good to happen.

B/c their self desire was too strong, too independent.

because of too much expectations