Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa de do snippets" » "khoa dr do snippets", "khoa he do snippets", "khoi de do snippets", "khoa de dao snippets", "khoa den do snippets", "khoa de doi 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 de do 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 de do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa de do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa de do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.