Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc giac do snippets" » "duc gia do snippets", "duc giao do snippets", "duoc giao do snippets", "duc giac mo snippets", "duc giac duoc 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: (((("duc giac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc giac do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc giac do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc giac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.