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