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