Perhaps you should try some spelling variations:
"dung ngu java snippets" » "dung nga java snippets", "dung ngo java snippets", "dung nguoi java snippets", "dung ngu va snippets", "dung ngu java slippers"
"dung cao dang snippets" » "duong cao dang snippets", "dung cho dang snippets", "dung co dang snippets", "dung cao dang slippers", "dung cao dan snippets", "dung cao dong snippets", "dung cao nang snippets"
"locating bug code snippets" » "locating bug code slippers", "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 ngu java snippets") or ("dung cao dang snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung ngu java snippets") OR ("dung cao dang snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung ngu java snippets ) or ( dung cao dang snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung ngu java snippets") or ("dung cao dang snippets"))) or ("locating bug code snippets"))*.