your options are these:
- google for buying bitcoin in Turkmenistan specially using your language not English. that helps with finding local sellers on local forums,...
- visit localbitcoins.com with your own IP and it will suggest sellers around you.
- visit local boards of this forum to find other people from your country and see if you can find someone around you that is willing to sell that much to you and get a bank transfer or p2p cash transfer meeting face to face:
https://bitcointalk.org/index.php#5- make a topic in currency exchange board:
https://bitcointalk.org/index.php?board=53.0- exchange your local currency into another currency like USD and use one of the many bitcoin exchanges to buy bitcoin. if you had trouble using the top exchanges you can always find people willing to change your fiat to online money like Perfect money and use that on btc-e to buy bitcoin.
be very careful of scammers