Perhaps you should try some spelling variations:
"cong dung cong snippets" » "cuong dung cong snippets", "cong dong cong snippets", "cong luong cong snippets"
"cong dung trong snippets" » "cuong dung trong snippets", "cong dong trong snippets", "cong luong trong snippets"
"locating bug code snippets" » "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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cong dung cong snippets") OR ("cong dung trong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dung cong snippets") OR ("cong dung trong snippets"))) OR ("locating bug code snippets")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cong dung cong snippets\") OR (\"cong dung trong snippets\"))) or (\"locating bug code snippets\"))".
• Removing quotes may allow a broader search: (((( cong dung cong snippets ) OR ( cong dung trong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dung cong snippets") OR ("cong dung trong snippets"))) or ("locating bug code snippets"))*.