Perhaps you should try some spelling variations:
"tran truong cao snippets" » "tran trong cao snippets", "tran trung cao snippets", "tran tuong cao snippets", "tran truong dai snippets"
"dung va java snippets" » "dung java java 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: (((("tran truong cao snippets") or ("dung va java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran truong cao snippets") OR ("dung va java snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( tran truong cao snippets ) or ( dung va java snippets ))) or ( locating bug code snippets ))*.