Perhaps you should try some spelling variations:
"nung cao robot snippets" » "nung cho robot snippets", "nung tao robot snippets", "nung a robot snippets", "nang cao robot snippets", "nhung cau robot snippets", "quang cao robot snippets", "nung cao robot slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nung cao robot snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( nung cao robot snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("nung cao robot snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.