Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan len cho snippets" » "luan lien cho snippets", "luan den cho snippets", "luan van cho snippets", "luan len choi snippets", "luan nen cho snippets", "luan ben cho 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: (((("luan len cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan len cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan len cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan len cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.