Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chen nu doi snippets" » "chen yu doi snippets", "chen bui doi snippets", "cheng lu doi snippets", "chen neu doi snippets", "chen tu doi snippets", "chen nu 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 doi 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 doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chen nu doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chen nu doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.