"may also partly" is a correct and usable phrase in written English.
You can use it to indicate that something could be partially responsible or partly responsible for something else. For example, "The rise in pollution in the city may also partly be attributed to the increased number of cars on the roads."
Geography may also partly dictate whether Utah swerves right or follows Mr. Huntsman's playbook toward the center.
They may also partly explain why such risk-aversion attitudes have helped several European countries weather the financial meltdown.
It may also partly explain Texas Governor Rick Perry's failure to gain much traction with Granite State voters.
The state's highest concentrations of Latinos can be found in the south and west, which may also partly explain the difference in climate views.
This may also partly explain why Liverpool's pursuit of Shakhtar's wonderful attacking midfielder, Henrikh Mkhitaryan, is likely to turn into one of the transfer sagas of the summer.
The dominant pattern of stabilisation which has occurred over the past 10 years may also partly be a result of effective EU and national environmental and agricultural policies, which are increasingly concerned with improving environmental conditions in rural areas.
It may also partly have been intended as a technology demonstration for the few countries still in the market to buy North Korean missiles, such as Iran (if so, it did not work well).
Heterogeneity may also partly contribute to the failure of personalized medicine.
(That may also partly explain some of Facebook's own moves to add more media to its site overall).
Therefore, flocculation may also partly explain why TMB3720 predominates under the harsh conditions of the SSL plant.
That may also partly explain why Twitter has instead opted to focus on ways of delivering promotions within users' Timeline streams instead, and continues ramping up with new products, such as the retargeting product announced this week.
