Perhaps you should try some spelling variations:
"tu trong long snippets" » "tu trong luong snippets", "tu truong long snippets", "tu trong cong snippets", "tu tuong long snippets", "tu tieng long snippets"
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data 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.

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