Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc cong von snippets" » "duc cuong von snippets", "dung cong von snippets", "nuoc cong von snippets", "duc dong von snippets", "duc cong lon snippets", "duc cong hon 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 cong von 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 cong von snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc cong von snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc cong von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.