The phrase "a more extensive examination" is correct and usable in written English.
It can be used when discussing the need for a thorough analysis or investigation of a subject or issue.
Example: "The results of the initial study suggest that a more extensive examination of the data is necessary to draw accurate conclusions."
Alternatives: "a deeper analysis" or "a more thorough review".
The second request for information means regulators will do a more extensive examination of the deal, rather than approving it immediately.
William E. Wallace, one of the foremost American experts on Michelangelo, who examined the painting in 2005, said there is at least enough evidence to merit a more extensive examination.
The photos set Roy off on an exhaustive research project, which began with a look at nuclear shelters throughout history but deepened into a more extensive examination of retro nuclear propaganda.
A more extensive examination was made on day 14 to try to ensure no lice were present.
We therefore undertook the sequencing of the complete genome of this species, along with a more extensive examination of flies from this interesting family.
On the basis of a more extensive examination of genomic regions surrounding the four candidate genes we found a sharp decrease of LD (r<0.2 within 1 cM) in all but one flanking regions.
The officials said the report would portray a more complicated and detailed picture, based on a far more extensive examination of suspected Iraqi weapons sites and records, as well as the debriefings.
A number of preliminary positive tests for anthrax at government offices have later turned out to be negative under more extensive examination and tests.
The new, more extensive examination, which looks at DNA in the cell nucleus, shows this conclusion is wrong.
More extensive examination of the adaptive immunity was carried out in the hope of identifying the responses involved in the improved long term control of virus replication in the original polyICLC/AT-2 SIV vacinees.
Thus, although our study replicates their findings, the more extensive examination of behavior and inclusion of body weight measurement in this study yield a more complex picture of the impact of early experience on adult feeding behavior and body weight and demonstrate that early dietary experience does alter adult consumption and vulnerability to obesity.
