Perhaps you should try some spelling variations:
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"
"luong dan code snippets" » "huong dan code snippets", "luong dao code snippets", "luong van code snippets", "luong dan de snippets"
"locating bug core snippets" » "locating bug code snippets"

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

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