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