Perhaps you should try some spelling variations:
"python using java grippers" » "python using data grippers"
"p trinh cham slippers" » "p trinh chat slippers", "p trinh chao slippers", "p trinh han slippers", "n trinh cham slippers", "lap trinh cham slippers", "co trinh cham slippers", "p trinh cham 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: (((("p trinh cham slippers") or ("python using java grippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("p trinh cham slippers") OR ("python using java grippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( p trinh cham slippers ) or ( python using java grippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("p trinh cham slippers") or ("python using java grippers"))) or ("locating bug code snippets"))*.