Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"yan hang ca snippets" » "yan zhang ca snippets", "ban hang ca snippets", "van hang ca snippets", "yan hang va snippets", "yan nang cao snippets", "yan hang tai 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: (((("yan hang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("yan hang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( yan hang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("yan hang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.