Perhaps you should try some spelling variations:
"phi van cong grippers" » "phi van soft grippers", "phi van dong grippers", "phi van phong grippers", "phi phan cong grippers", "phi san cong grippers", "thi van cong grippers", "phi va cong 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: (((("phi van cong grippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi van cong grippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi van cong grippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi van cong grippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.