Just type "Turko-Russian" into any search engine and you'll find nothing but wars that have raged throughout history. But speak of the devil and he shall appear, as they say – so let's skip that nasty aspect of our histories (and also avoid the ire of the Russian Ambassador Mr. Aleksei Erkhov – who takes exception to whatever I say).
In order to bring peace to Syria, the two leaders, Messrs. Vladimir Putin and Recep Tayyip Erdoğan have opted to work together, listen to each other and concede to each other's opinions. Since this thaw, there have been major reconciliations, compromises and even agreements on almost every aspect of the problems emanating from Syria. The two countries were not supposed to see eye to eye on any issue with regards to Syria: Russia is the only ally of the Syrian regime; Mr. Putin is the only person in the world who is on speaking terms with Bashar Assad (with the exception members of Iran's Revolutionary Guard, dead or alive). Turkey considers Assad a butcher of his own people, four million of whom currently reside in Turkey. Mr. Assad is in the process of sending even more to Turkey by furthering the bombing, killing and maiming of his people.
Amidst all of this, we come to the most contemporary and positive usage of the term "Turko-Russian": The Idlib agreement. The Brooking Institute referred to this deal as "a piece of the Syrian puzzle." A puzzle indeed! Russia and Turkey agreed to create a demilitarized buffer zone in Idlib to separate government forces from rebel fighters based there. President Putin himself had said it would be 15 to 25 kilometers (9 to 15 miles) wide, with troops from Russia and Turkey patrolling the area.