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