Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan hiem he snippets" » "phan hieu he snippets", "phan kiem he snippets", "phan thiet he snippets", "phan hiem xe snippets", "phan thien he 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 hiem he 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 hiem he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan hiem he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan hiem he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.