Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khac o cao snippets" » "khac do cao snippets", "khac co cao snippets", "khac mo cao snippets", "khac o lao snippets", "khac o cac 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: (((("khac o cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khac o cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khac o cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khac o cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.