Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery", "python using java slippers"
"p trinh da grippers" » "p trinh dan grippers", "p trinh dao grippers", "p trinh do grippers", "n trinh da grippers", "lap trinh da grippers", "co trinh da grippers", "p trinh da 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 da 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 da grippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( p trinh da grippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("p trinh da grippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.