Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chen de doi snippets" » "chen den doi snippets", "chem de doi snippets", "chuyen de doi snippets", "chen te doi snippets", "chen ve doi snippets", "chen ke doi 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 de 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 de doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chen de doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chen de doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.