The phrase "their emphasis on" is correct and is used regularly in written English.
For example: "Their emphasis on education has led to improved literacy rates."
Where today's names differ is their emphasis on mood.
Industries vary in their emphasis on specific knowledge content components.
His pieces, though, have in recent years drawn some criticism for their emphasis on lush beauty.
Superhero movies, with their emphasis on mad-science mutation, have a retrofuturist appeal.
For Perina, their emphasis on "the absolute value of emancipation through work" was alienating.
Their emphasis on schools that model kindness and encourage collaboration is especially on target.
In the survey, Asians are also distinguished by their emphasis on traditional family mores.
Their emphasis on inclusion sprang from their experience as an interracial couple.
Petrostate SWFs have increased their emphasis on investing in science and research.
Better still, what makes small record stores different is their emphasis on selling locally produced music.
Compassion International's child-poverty narratives are consistent in their emphasis on individual hardship and individual response.
