Perhaps you should try some spelling variations:
"dung du chieu snippets" » "dung du code snippets", "dung da chieu snippets", "dung duy chien snippets", "dung doi chieu snippets", "dung de chieu snippets", "dung cu chieu snippets", "dung cua chieu snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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 ("dung du chieu snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung du chieu snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung du chieu snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung du chieu snippets"))) or ("locating bug core snippets"))*.