"be skillful in" is a correct and usable phrase in written English.
You can use it when you want to suggest that someone possesses or is working to improve a certain set of skills. For example, "Rita is working hard to be skillful in her piano playing."
On the other hand, its disadvantages are as follows: (1) the operative time is prolonged; (2) the removal of contaminants may be insufficient; and (3) the surgeon needs to be skillful in the manipulation of sutures.
For instance, the specific sources of information referred to as "the Internet" are not defined, thus taking for granted the possibility that not all the respondents might be skillful in surfing the web for reproductive health information.
Imagine being skillful in your mind's eye and you'll be skillful in reality.
The teacher must be skillful in creating an environment that is deliberate and purposeful yet guided and influenced by students' creativity and discovery.
True, the museum has been skillful in attracting donations for spectacular displays.
He is skillful in putting on "an antic disposition" and gives a very funny performance in talking to Polonius.
I found that most of the dynamic forecasts are skillful in predicting the seasonality, but many of them are not as good at predicting the deviations.
He was skillful in the design of experimental apparatus, as was shown early in his career during his investigations of colour vision.
Al Qaeda has been skillful in making alliances of its own with important tribes in provinces like Hadramawt, Shabwah, Marib, where much of the oil is, and Abyan.
Politico notes that President Obama has been skillful in using the Spanish-language channel Univision to reach Latino voters, a crucial voting segment in this year's election.
When the scribe was skillful in reconciling clarity and speed, such writing may have much character, even beauty; but it often degenerates into a formless, sometimes indecipherable, scrawl.
