"Closer examination" refers to taking a more detailed or careful look at something in order to better understand, analyze, or evaluate it. Full definition
The paintings are a series of close examinations of the landscape encountered during travels and closer to home. (www2.ocadu.ca)
Upon closer examination of these instruction books, I noticed that many of them were for computers and software that I no longer use or even own. (edutopia.org)
I recently embarked on close examination of the self - publishing sector, having become aware just how fast it was developing. (thecreativepenn.com)