Perhaps you should try some spelling variations:
"doi trinh java snippets" » "doc trinh java snippets", "doi tinh java snippets", "dong trinh java snippets"
"using low java slippers" » "using low java slippery", "using low java 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: (((("using low java slippers") OR ("doi trinh java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using low java slippers ) or ( doi trinh java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using low java slippers") or ("doi trinh java snippets"))) or ("locating bug code snippets"))*.