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