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