Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoe moi da snippets" » "hoc moi da snippets", "cho moi da snippets", "khoe moi dan snippets", "khoe moi la snippets", "khoe moi va 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: (((("khoe moi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoe moi da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoe moi da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoe moi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.