Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dao luan data snippets" » "dao luat dat snippets", "dao luan dac snippets", "dao luan danh snippets", "dan luan data snippets", "dao xuan data snippets", "dat luan data snippets"
"locating bug core snippets" » "locating bug 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 java code snippets") or ("dao luan data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("dao luan data snippets"))) OR ("locating bug core snippets"))*.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dao luan data snippets ))) or ( locating bug core snippets ))*.