Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"doi tat trong snippets" » "doi vat trong snippets", "doi dat trong snippets", "doi bat trong snippets", "doi tac trong snippets", "do tat trong snippets", "doi tai trong snippets"
"locating bug core snippets" » "locating bug code 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: (((("using java code snippets") OR ("doi tat trong snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( doi tat trong snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("doi tat trong snippets"))) or ("locating bug core snippets"))*.