Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"danh viet code snippets" » "anh viet code snippets", "ninh viet code snippets", "nang viet code snippets", "danh viet co snippets", "danh viet some snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"

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: (((("danh viet code snippets") or ("dung java java slippers"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh viet code snippets") OR ("dung java java slippers"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( danh viet code snippets ) or ( dung java java slippers ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh viet code snippets") or ("dung java java slippers"))) or ("locating bugs code snippets"))*.