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