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