Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lili wang o2 snippets" » "li wang o2 snippets", "lei wang o2 snippets", "ling wang o2 snippets", "lili hang o2 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: (((("lili wang o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lili wang o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lili wang o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lili wang o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.