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