Perhaps you should try some spelling variations:
"dan trinh co grippers" » "dan trinh soft grippers", "dan tinh co grippers", "van trinh co grippers", "hanh trinh co grippers", "dan trinh do grippers", "dan trinh cong grippers", "dan trinh hoa grippers"
"python using java slippers" » "python using data slippers", "python using java slippery"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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