Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chang xu cao snippets" » "chang xue cao snippets", "chao xu cao snippets", "thong xu cao snippets", "chang cu cao snippets", "chang vu cao snippets", "chang su cao 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: (((("chang xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chang xu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chang xu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chang xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.