Perhaps you should try some spelling variations:
"dung java java slippery" » "dung va java slippery", "dung java java slippers"
"truong dai toc snippets" » "truong dan toc snippets", "truong dai hoc snippets", "truong dai luoc snippets"
"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: (((("dung java java slippery") or ("truong dai toc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java slippery") OR ("truong dai toc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java slippery ) or ( truong dai toc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java slippery") or ("truong dai toc snippets"))) or ("locating bug code snippets"))*.