Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu doan von snippets" » "kieu doan von snippets", "khu do von snippets", "thi doan von snippets", "khu doan van snippets", "khu toan von snippets", "khu doanh van 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: (((("khu doan 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: (((("khu doan von snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu doan von snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu doan von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.