Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den tran chi snippets" » "den tuan chi snippets", "den thanh chi snippets", "dang tran chi snippets", "den trang chi snippets", "den tran thi snippets", "den toan chi 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 tran chi 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 tran chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den tran chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den tran chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.