A weird thing about Google search results?

[samurai]

After you go through both screenshots, you will know what the problem is.
http://picasaweb.google.com/mailtumengyu/Screenshots/photo#5118141703352468434
http://picasaweb.google.com/mailtumengyu/Screenshots/photo#5118141707647435746
The term 13506753648 should hit at least one document, but it doesn't.
Any idea?

[Nishan]

This may not be the perfect answer. But you can think of this if any of the answers doesn’t fit for your. I think the number 13506753648 doesn’t appear in any “web page”. That’s why you don’t get any results for that according to the link http://picasaweb.google.com/mailtumengyu/Screenshots/photo#5118141707647435746 But if you observe closely you get a result page for a different search done in a different language as shown in the link http://picasaweb.google.com/mailtumengyu/Screenshots/photo#5118141703352468434 Can you see the text “[xls] userinfosheet” in that result? This means (as I guess) the number 13506753648 is probably a value which appears in a cell inside the MS Excel file called “userinfosheet.xls” and my guess is Google doesn’t search the numbers in side the excel files when you give a standard search like 13506753648 inside the Google search box.
I don’t know weather this help or not. But this is my try for your answer!

[sqleung]

Lol, I think you have too much time on your hands here! :P

Anyway, I don't think Google is 100% accurate at what it searches. It's either or that or Google isn't good with numbers.