Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phu le doan snippets" » "phu le dan snippets", "phu ly doanh snippets", "phu le hoang snippets", "phuc le doan snippets", "phu ly doan snippets", "phu la 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: (((("phu le doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phu le doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phu le doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phu le doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.