Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi viet a slippers" » "dai viet a slippers", "hoi viet a slippers", "oi viet a slippers", "doi viet ha slippers", "doi viet ca slippers", "doi viet o slippers", "doi viet a slippery", "doi viet a grippers"
"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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi viet a slippers") OR ("python using java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( doi viet a slippers ) or ( python using java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("doi viet a slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.