If you are looking for a younger woman to date try and keep the age difference between you to no more than 13 years for Bulgarian ladies and 16 years for Russian ladies.
The reason for the slight difference in dating is the imbalance in the population in Russia; due to sheer lack of men it is simply harder to find a husband for Russian brides or Russian women.
Russia on the other hand is very expensive and not very safe.
The Russian Mafia runs the cities and bribery and corruption are abundant.
Then you can send short notes to the women you like and find out who is interested in getting to know you, also free of cost.
Beautiful young Asian girls will absolutely readily marry men much older than themselves!
Just keep in mind that their motivation for this may not be as pure as you think and you may find yourself wifeless once she has got citizenship/money through marrying you.
In some cases in Russia one can find a woman much younger partner for dating but remember, the greater your age difference, the less the chances of your marriage surviving and more chances of getting married to someone who has no feelings for you, but plenty of financial plans...
You will be able to find subservient women in some other countries such as Thailand, Philippines, Vietnam, Korea, Laos etc.