Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"he dan trong slippers" » "he ban trong slippers", "he dat trong slippers", "he dao trong slippers", "ke dan trong slippers", "le dan trong slippers", "he dai trong slippers", "he dan trong 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: (((("he dan trong slippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("he dan trong slippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( he dan trong slippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("he dan trong slippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.