I wrote this sentence:
Beside the main content, a web page may comprise of distracting parts such as ads, animations, logos, that can degrade the readability of the main content and pose difficulties to readers. In addition to these factors, colour contrast, font style, letter spacing, layout, line height and length of the content are among of the other factors that affect the readability of a web page. These problems could be more serious for specific population such as older adults, visually impaired users, non-native readers (those reading a page in a non-native language).
I guess the bold phrase should be common when someone want to say, the problem is more serious for specific group. but I wonder the Google results for it is just 2 case.
Are there better alternatives for my purpose?
Update: As I searched more "the problem could be more serious" (119000) and "the problem is more serious" (about 8 million results). I am convinced that I'd better use the latter phrase, but why so much difference? is "these problems" that odd?