Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao xy model snippets" » "cao a model snippets", "cao 1 model snippets", "cao _ model snippets", "cao ky model snippets", "cao sy model 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: (((("cao xy model snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao xy model snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao xy model snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao xy model snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.