Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan den doi snippets" » "quan den doi snippets", "luan de doi snippets", "luan len doi snippets", "luan den do snippets", "luan den coi 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 den doi 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 den doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan den doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan den doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.