Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan chat cao snippets" » "van chat cao snippets", "dan chan cao snippets", "ban chat cao snippets", "dan chat co snippets", "dan chat cho snippets", "dan chat bao 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: (((("dan chat 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: (((("dan chat cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan chat cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan chat cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.