Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi tu co snippets" » "hoi tu co snippets", "khoi su co snippets", "choi tu co snippets", "khoi ty co snippets", "khoi tu so snippets", "khoi tu do 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 tu co 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 tu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi tu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi tu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.