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