Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc lan don snippets" » "duc lanh don snippets", "duc tan don snippets", "duc van don snippets", "duc la don snippets", "duc lan dan 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 lan don 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 lan don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc lan don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc lan don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.