Ask your other family members
If your family members have not been in touch with you, it does not mean that they have not been in contact with the rest of the family. Therefore, you should make a list of your close family members or potential family members with which those persons would be interested in meeting with and enquire them about the family members. You can also ask your mutual friends and seek information as they might be able to help you. There is a high probability that your family members will be in touch with their closed cousins or uncles, so do not forget to ask them.
Take help from the internet
If your efforts in enquiring with other family members fail miserably, then you should take help from the internet. Remember that, internet is something no one can imagine to live without. With the increased variety of social media platforms and other communication tools, it is impossible that your lost family members will not be taking advantage of these facilities. Nowadays, everyone uses social media websites to interact and socialise with other people so you must search on the internet and try to find your family.
Use commercial services
If you do not have the nerve to wait for your family members and want to see them as soon as possible, then you can also take benefit of the commercial services that provide database of the people. If your efforts of free searching over the internet have failed then you should take advantage of these services.
Hire an individual
If all of your efforts fail and you were unable to have a clue about your family members, maybe it is because they do not want to be found. For this, consider hiring a professional investigator as he can play a crucial role.