Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"dan ao sach snippets" » "dan cao sach snippets", "dan lao sach snippets", "dan bo sach snippets", "dan bao sach snippets", "dan dao sach snippets", "dan ap sach snippets", "dan ao sach slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan ao sach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( dan ao sach snippets ) or ( python using java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dan ao sach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.