Perhaps you should try some spelling variations:
"dong qua code snippets" » "duong qua code snippets", "dong cua code snippets", "dong mua code snippets", "dong qua cong snippets", "dong qua co snippets", "dong qua con snippets", "dong qua code slippers"
"dung cfd code snippets" » "dung cho code snippets", "dung cua code snippets", "dung co code snippets", "dung cfd code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: "((((\"dong qua code snippets\") OR (\"dung cfd code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dong qua code snippets ) OR ( dung cfd code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dong qua code snippets") OR ("dung cfd code snippets"))) OR ("locating bug code snippets"))*.