Perhaps you should try some spelling variations:
"n trinh vat grippers" » "n trinh soft grippers", "n trinh van grippers", "n trinh luat grippers", "n sinh vat grippers", "p trinh vat grippers", "anh trinh vat grippers", "dan trinh vat grippers"
"python using java slippery" » "python using data slippery", "python using java 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("n trinh vat grippers") OR ("python using java slippery"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( n trinh vat grippers ) or ( python using java slippery ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("n trinh vat grippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.