Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"van trinh co slippers" » "van thinh co slippers", "van tinh co slippers", "dan trinh co slippers", "van trinh do slippers", "van trinh cong slippers", "van trinh hoa slippers", "van trinh co grippers"
"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: (((("van trinh co slippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van trinh co slippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van trinh co slippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van trinh co slippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.