Perhaps you should try some spelling variations:
"hoang tran doan snippets" » "hoang tuan doan snippets", "hoang thanh doan snippets", "hoang van doan snippets", "hoang trang doan snippets", "hoang tan doan snippets", "hoang tran hoan 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("hoang tran doan snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( hoang tran doan snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("hoang tran doan snippets"))) or ("locating bug code snippets"))*.