Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den hoc de snippets" » "dien hoc de snippets", "dan hoc de snippets", "de hoc de snippets", "den hoc he snippets", "den hoc te snippets", "den hoc do 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 hoc de 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 hoc de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den hoc de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den hoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.