At this stage, the program can find the last instance of the text match in the PDF files. It could be modified to save all matches to memory and then output them by modifying the VBA code.
To extract exact instances of the text you need to be explicit with the start and end text by providing as much unique text as possible so that the program does not confuse it with other text in the PDF file. In this case, there may be other text after or before "Depth" that can be specified in order to extract the correct instance.