Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung su cao snippets" » "dung cu cao snippets", "dung du cao snippets", "dung so cao snippets", "dung vu cao snippets", "dung su co 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: (((("dung su 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: (((("dung su cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung su cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung su cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.