Found an interesting 20 year old story in the New York times:
CONTRABAND WOMEN – A special report.; Traffickers' New Cargo: Naive Slavic Women
"Centered in Moscow and the Ukrainian capital, Kiev, the networks trafficking women run east to Japan and Thailand, where thousands of young Slavic women now work against their will as prostitutes, and west to the Adriatic Coast and beyond. The routes are controlled by Russian crime gangs based in Moscow. Even when they do not specifically move the women overseas, they provide security, logistical support, liaison with brothel owners in many countries and, usually, false documents.
Women often start their hellish journey by choice. Seeking a better life, they are lured by local advertisements for good jobs in foreign countries at wages they could never imagine at home.
In Ukraine alone, the number of women who leave is staggering. As many as 400,000 women under 30 have gone in the past decade, according to their country's Interior Ministry. The Thai Embassy in Moscow, which processes visa applications from Russia and Ukraine, says it receives nearly 1,000 visa applications a day, most of these from women.
Israel is a fairly typical destination. Prostitution is not illegal here, although brothels are, and with 250,000 foreign male workers – most of whom are single or here without their wives – the demand is great. Police officials estimate that there are 25,000 paid sexual transactions every day. Brothels are ubiquitous."
https://www.nytimes.com/1998/01/11/world/contraband-women-a-special-report-traffickers-new-cargo-naive-slavic-women.html