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