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