1. Women are about stability and safety, so if you are not in a very prosperous, stable or liberal country, you are not going to attract them into immigrating to your country.
2. As to immigrating to woman's country, generally speaking, women are not as forthcoming as men, unless you look like Antonio Banderas, and if you do, they'll even convert for you.
3. If you are looking for real marriage, then look in Muslim countries, because marriage is disappearing in the west. In 2014, over 53% of American females over the age of 18 were found to be living single, and divorce rate was also 53% with women filing 67% of the divorces. These numbers are even worse in Europe with divorce rates as high as 73%. Interestingly, even in Muslim countries 67% of the divorces are being filed by women! Financial independence is the # 1 reason for divorces and late marriages.
4. If you are looking for less than 10 years of age difference, then you should look in your own country because immigration relationships involve larger age differences than 10 years.