Perhaps you should try some spelling variations:
"dang ngoc chien snippets" » "dang cuoc chien snippets", "dang ngoc lien snippets", "hoang ngoc chien snippets", "van ngoc chien snippets", "dang nghe chien 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: (((("dung java java snippets") or ("dang ngoc chien snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dang ngoc chien snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dang ngoc chien snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dang ngoc chien snippets"))) or ("locating bug code snippets"))*.