Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc pham de snippets" » "duoc pham de snippets", "duc phan de snippets", "duc phap de snippets", "duc pham le snippets", "duc pham do snippets", "duc pham duc 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 pham de 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 pham de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc pham de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc pham de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.