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