Need search during infinite loading of data

Question

I need help, 

Here the problem is that I want to make an API for the app, during scroll I can search the data. In the below code, I am able to do Infinite scroll but not sure how to give search functionality. For example, I have a scroll 3 pages (1 page have 10 records) and during that time I want to search string like "David" so it will give search string within 30 records

 

public dynamic GetAllUsersList(int Count, int UserId)

{

using (LystenEntities db = new LystenEntities())

{

OnlineUserViewModel uv = new OnlineUserViewModel();

uv.TotalCount = db.User_Master.Where(x => x.IsActive == true).Where(x => x.RoleId != 1 && x.Id != UserId).ToList().Count();

int skip = 10 * Count;

string baseURL = HttpContext.Current.Request.Url.Authority;

baseURL += (WebConfigurationManager.AppSettings["userimagepath"]).Replace("~", "");

uv.userdetail =

db.User_Master.Where(x => x.RoleId != 1 && x.Id != UserId && x.IsActive == true).Select(x => new userdetail()

{

Id = x.Id,

Email = x.Email,

Displayname = x.FullName == null ? "" : x.FullName,

Image = (x.Image == null) ? "" : x.Image == "" ? "" : (baseURL + x.Image)

}).OrderBy(x => x.Displayname).Skip(skip).Take(10).ToList();

return uv;

}

}