Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung san viet slippers" » "dong san viet slippers", "dung sai viet slippers", "dung luan viet slippers", "dung gian viet slippers", "dung anh viet slippers", "dung san viet slippery", "dung san 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 san 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 san viet slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung san viet slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung san viet slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.