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