Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"tu cach dung slippers" » "tu sach dung slippers", "tu cach mang slippers", "tu tac dung slippers", "tu cac dung slippers", "tu cach dung grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tu cach dung slippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tu cach dung slippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tu cach dung slippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tu cach dung slippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.