"working on enhancing" is correct and usable in written English.
You can use it when describing that someone is doing something to improve something, for example: "We are currently working on enhancing our website design to make it more user-friendly."
"We're working on enhancing the learning experience with streaming video across all devices, supplementary course materials (like presentations, documents, samples etc).
In spite of natural dyes low efficiencies compared to ruthenium complexes, they attracted the attention of many researchers working on enhancing their performance by studying the effect of various factors in the extraction process, such as drying, grinding, temperature, anchorage time, and using different compounds of solvents [17, 18].
As we mentioned yesterday, we think that Facebook is working on enhancing its messaging services as a way to keep the service evolving, and catching the attention of those who may not be using it as much as they could be to communicate.
He explains that the Soviets had been working on enhancing the virus to create insidious airborne artillery.
"The current produced is not that high, but we are working on enhancing it so that eventually we could power some small electronic devices," Wenzhao Jia, one of the researchers who conducted the study, explained.
In an effort to combat the damage caused by hackers and help the state's more than 12 million residents prevent and recover from identity theft, Illinois Attorney General Lisa Madigan is working on enhancing the Illinois Personal Information Protection Act (PIPA).
We have worked on enhancing TELIC, a bandwidth allocation algorithm for MPLS-Diffserv domains to increase the overall BW utilization.
Google itself added more social graph-powered features to Android with last year's KitKat update, and it continues to work on enhancing its stock messaging and phone apps.
Various researchers have worked on enhancing operability by providing the operator with the necessary information to reduce operation time and errors.
This assessment suggests that the DTTB Program needs to work on enhancing the factors that drive retention, whilst mitigating those that impede it.
The study demonstrated how an expert facilitator guided the group discourse with the use of open-ended metacognitive questions, and how students actively worked on enhancing and refining their collective knowledge throughout the group interaction portions of a PBL cycle.
