Perhaps you should try some spelling variations:
"python using data slippers" » "python using java slippers", "python using sat slippers", "python missing data slippers", "python using data grippers"
"tu phan van slippery" » "tu pham van slippery", "tu thanh van slippery", "tu luan van slippery", "thu phan van slippery", "tu nhan van slippery", "tu phat van slippery"
"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: (((("tu phan van slippery") or ("python using data slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tu phan van slippery") OR ("python using data slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tu phan van slippery ) or ( python using data slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tu phan van slippery") or ("python using data slippers"))) or ("locating bug code snippets"))*.