Perhaps you should try some spelling variations:
"dung hieu cong snippets" » "dung hieu code snippets", "dong hieu cong snippets", "dung tieu cong snippets", "trung hieu cong snippets", "dung lieu cong snippets", "dung hien cong snippets", "dung thien cong 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 hieu cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hieu cong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung hieu cong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hieu cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.