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