Perhaps you should try some spelling variations:
"python using java grippers" » "python using data grippers"
"tu nhan van slippers" » "tu nhan dan slippers", "tu nhan va slippers", "tu phan van slippers", "tue nhan van slippers", "cu nhan van slippers", "tu ngan van slippers", "tu nhan van slippery"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tu nhan van slippers") or ("python using java grippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tu nhan van slippers") OR ("python using java grippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tu nhan van slippers ) or ( python using java grippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tu nhan van slippers") or ("python using java grippers"))) or ("locating bug code snippets"))*.