Perhaps you should try some spelling variations:
"dong lua doi snippets" » "dong luan doi snippets", "dong luc doi snippets", "dong cua doi snippets", "dong sua doi snippets", "dong quan doi snippets"
"using a code snippets" » "using a core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using a code snippets") or ("dong lua doi snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("dong lua doi snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( dong lua doi snippets ))) or ( locating bug code snippets ))*.