Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thong ke can snippets" » "thong ke cau snippets", "thong ke dan snippets", "thong ke san snippets", "trong ke 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: (((("thong ke 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: (((("thong ke can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong ke can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong ke can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.