Perhaps you should try some spelling variations:
"dang cuong le snippets" » "dang cong le snippets", "tang cuong le snippets", "quang cuong le snippets", "dang vuong le snippets", "dang cuong ve snippets", "dang duong le 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 cuong le 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 cuong le snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang cuong le snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang cuong le snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.