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