Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc bao lon snippets" » "du bao lon snippets", "duc dao lon snippets", "duc ban lon snippets", "duc bao ton snippets", "duc bai lon snippets", "duc bay lon 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: (((("duc bao lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc bao lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc bao lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc bao lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.