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