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