Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chen den cua snippets" » "chen wen cua snippets", "chet den cua snippets", "chen chen cua snippets", "chen dien cua snippets", "chen de cua snippets", "chen dan cua 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 den cua 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 den cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chen den cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chen den cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.