Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chen dan cac snippets" » "chen den cac snippets", "chan dang cac snippets", "chen wang cac snippets", "chen dan cach snippets", "chen dang cac snippets", "chen dan ca 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 dan cac 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 dan cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chen dan cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chen dan cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.