Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc long vo snippets" » "duc cong vo snippets", "duc dong vo snippets", "duc hong vo snippets", "duc long ve snippets", "duc long vu snippets", "duc song vo 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 long vo 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 long vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc long vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc long vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.