Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan he cao snippets" » "phan che cao snippets", "phan h cao snippets", "phan ha cao snippets", "phan he co snippets", "phan te cao snippets", "phan he cac 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: (((("phan he cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan he cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan he cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan he cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.