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