Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chen nu doc snippets" » "chen yu doc snippets", "chen bui doc snippets", "cheng lu doc snippets", "chen n1 doc snippets", "chen n2 doc snippets", "chen n3 doc 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: (((("chen nu doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chen nu doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chen nu doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chen nu doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.