Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery", "python using java slippers"
"he dan trong grippers" » "he ban trong grippers", "he dat trong grippers", "he dao trong grippers", "ke dan trong grippers", "le dan trong grippers", "he dai trong grippers", "he dan trong slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

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 grippers") 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 grippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( he dan trong grippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("he dan trong grippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.