Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chen yu lon snippets" » "chen su lon snippets", "chen yu lin snippets", "chien yu lon snippets", "che yu lon snippets", "chan yu lon 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 yu lon 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 yu lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chen yu lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chen yu lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.