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