Perhaps you should try some spelling variations:
"dung using java slippers" » "dung ung java slippers", "dung sinh java slippers", "dung uong java slippers", "dung using data slippers", "dung using java slippery", "dung using java grippers"
"dung kai code snippets" » "dung tai code snippets", "dung sai code snippets", "dung hai code snippets", "dung kai core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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

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