Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan vu son snippets" » "doan va son snippets", "doan vi son snippets", "doan tu son snippets", "doan vu san snippets", "doan xu son 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: (((("doan vu son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan vu son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan vu son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan vu son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.