Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham do chu snippets" » "pham doi chu snippets", "pham mo chu snippets", "pham o chu snippets", "pham dao chu snippets", "pham do nhu snippets", "pham co chu 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: (((("pham do chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham do chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham do chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham do chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.