Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan ke do snippets" » "phan le do snippets", "phan ve do snippets", "phan ky do snippets", "phan ke o snippets", "phan ke co snippets", "phan ke mo 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 ke do 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 ke do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan ke do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan ke do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.