Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dang van pha slippers" » "hoang van pha slippers", "hang va pha slippers", "dang van phan slippers", "dang van phat slippers", "dang van phac slippers", "dang van pha slippery", "dang van pha 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 java java snippets") or ("dang van pha slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dang van pha slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dang van pha slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dang van pha slippers"))) or ("locating bug code snippets"))*.