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