Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam quan den snippets" » "dan quan den snippets", "dao quan den snippets", "dap quan den snippets", "dam quan doan snippets", "dam quan he snippets", "dam quan 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: (((("dam quan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dam quan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam quan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam quan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.