Social search engine Blekko has received $30 million in a round of funding from European Internet company Yandex, MLC Private Equity and existing investors U.S. Venture Partners, CMEA Capital and PivotNorth Capital.

Blekko was founded in 2007 and launched to the public in November of 2010. It offers search results that are curated by users so content is more reliable and users see less spam – they’ve also blocked 1.1 million domains that were generating spam. Recently, the company launched a tool called “Web Grepper” that offers richer search results by digging deeply into the website’s code and added Facebook comments and Likes to its search listings.

Yandex, which is home to 3,000 employees across Russia, Ukraine, Kazakhstan, Belarus, Turkey and the U.S. offers a wide range of services including Web, news and video search, real-time traffic monitoring, maps, photo hosting and spam protection, among other things.

As part of the funding, Arkady Volozh, Founder and CEO of Yandex, will join the Blekko board. He said:

Blekko’s top tier technology and fresh product approach has enabled it to sustain growth since it launched, something no other U.S. search start up has been able to accomplish in more than a decade. We love Blekko and think it’s a great product – a quality search engine that organically combines search algorithms with expert opinions. We believe the outlook for this approach is strong and that the Blekko team is poised to make it a success.

Yandex didn’t just contribute to Blekko’s funding. The 2 companies have partnered and Blekko plans to leverage Yandex’s products and team to help their search engine grow in the U.S. Blekko has partnered with a number of companies in the past, including Foodily for improved recipe search results.