Perhaps you should try some spelling variations:
"python using java grippers" » "python using data grippers", "python using java slippers"
"dan hoc nhap slippery" » "dan hoi nhap slippery", "dan hoc phap slippery", "dan hoa nhap slippery", "van hoc nhap slippery", "dan toc nhap slippery", "dai hoc nhap slippery", "dan hoc nhap slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dan hoc nhap slippery") or ("python using java grippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan hoc nhap slippery") OR ("python using java grippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan hoc nhap slippery ) or ( python using java grippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hoc nhap slippery") or ("python using java grippers"))) or ("locating bug code snippets"))*.