Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"wei dan chan snippets" » "wei dan gian snippets", "wei dan ca snippets", "wei van chat snippets", "wei tan chan snippets", "wei dai chan snippets", "wei pan chan 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: (((("wei dan chan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("wei dan chan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei dan chan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei dan chan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.