Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham luan c snippets" » "phap luan c snippets", "pham quang c snippets", "pham van c snippets", "pham luan y snippets", "pham luan chi snippets", "pham luan dac 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 luan c 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 luan c snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham luan c snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham luan c snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.