Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa dan we snippets" » "khoa dang we snippets", "hoa dan we snippets", "khoa can we snippets", "khoa dan ve snippets", "khoa dan de 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: (((("khoa dan we snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa dan we snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa dan we snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa dan we snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.