Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den hoa chat snippets" » "den hop chat snippets", "den hoa phan snippets", "dien hoa chat snippets", "den ha chat snippets", "den ho chat 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 hoa chat 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 hoa chat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den hoa chat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den hoa chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.