Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pho cong dot snippets" » "pho uong dot snippets", "cho cong dot snippets", "pho dong dot snippets", "pho cong mot snippets", "pho cong dong snippets", "pho cong doan 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: (((("pho cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pho cong dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pho cong dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pho cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.