Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa khac du snippets" » "khoa kham du snippets", "khoanh khac du snippets", "khoa hoc du snippets", "khoa khac di snippets", "khoa khac do snippets", "khoa khac duan 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 khac du 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 khac du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa khac du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa khac du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.