Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc vy cho snippets" » "duc va cho snippets", "duc sy cho snippets", "duc y cho snippets", "duc ky cho snippets", "duc ly cho snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duc vy cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc vy cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc vy cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc vy cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.