Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong luan di snippets" » "tong luan di snippets", "cong tuan di snippets", "dong luan di snippets", "cong luan doi snippets", "cong luan de snippets", "cong luan vi 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: (((("cong luan di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong luan di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong luan di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong luan di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.