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