Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao den cong snippets" » "cao dien cong snippets", "cao den dong snippets", "cao len cong snippets", "cao de cong snippets", "cap den cong snippets", "cau den 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: (((("cao den 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: (((("cao den cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao den cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao den cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.