Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran duy von snippets" » "tran duc von snippets", "tran quy von snippets", "tran thuy von snippets", "tran duy van snippets", "tran duy son snippets", "tran dung von 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: (((("tran duy 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: (((("tran duy von snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran duy von snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran duy von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.