Perhaps you should try some spelling variations:
"python using java grippers" » "python using data grippers"
"phi hoa viet slippers" » "phi hoat viet slippers", "thi hoa viet slippers", "phi ha viet slippers", "phi hoa 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 hoa 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 hoa viet slippers") OR ("python using java grippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi hoa viet slippers ) or ( python using java grippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi hoa viet slippers") or ("python using java grippers"))) or ("locating bug code snippets"))*.