Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung chu viet slippers" » "dung chau viet slippers", "dung cho viet slippers", "dung cu viet slippers", "dung che viet slippers", "dung khau viet slippers", "dung su viet slippers", "dung chu viet slippery", "dung chu viet grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 chu viet slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung chu viet slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung chu viet slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung chu viet slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.