The phrase 'possibilities regarding' is correct and usable in written English.
You can use the phrase to refer to possible things or scenarios related to a certain topic. For example: "We are exploring all possibilities regarding the design of the new product."
The statistical examination of the Fallon childhood cancer cluster by Steinmaus et al. (2004) provides renewed justification for opening a larger window onto the expanse of possibilities regarding a possible cause for this extraordinary cluster.
During talks at the State Department last week with Mr. Arafat's second-in-command, Mahmoud Abbas, General Powell offered several possibilities regarding the Israeli settlements, officials said.
There are two possibilities regarding how these decisions are mediated.
Challenges and possibilities regarding the use of insect meal by the Brazilian poultry industry are discussed.
Figure 7 shows that using three random models of the same accuracy opens multiple possibilities regarding accuracy improvement.
This effective width covers the different possibilities regarding the angle widths and the bolt-to-stiffener positions.
What possibility regarding American involvement in Iraq does the editorial raise?
THE scariest possibility regarding Barack Obama's decision yesterday to begin providing limited military aid to the Syrian rebels would be if it had something to do with the advice he was getting from Bill Clinton.
Misbah-ul-Haq is looking at every possibility regarding the makeup of his team before Thursday's fourth Test here, with the Pakistan captain eyeing a drawn series with England that he believes would represent a continuation of their domination in recent times.
Apart from this possibility regarding Aristoxenus, no one earlier than Diogenes (ca. 200 AD) calls Alcmaeon a Pythagorean.
One interesting possibility regarding manufacture of foams is indeed the possibility to construct fully iso-reticular foams where the residence time, pressure drop and heat transfer properties can be tuned for specific reactions.
