Perhaps you should try some spelling variations:
"p trinh su grippers" » "p trinh soft grippers", "p trinh tu grippers", "p trinh san grippers", "p trinh cau grippers", "n trinh su grippers", "lap trinh su grippers", "co trinh su 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.

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