Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"do trong code snippets" » "do trong cong snippets", "do trong co snippets", "do trong che snippets", "dot trong code snippets", "dao trong code snippets", "doi trong code snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java java snippets\") OR (\"do trong code snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java java snippets ) OR ( do trong code snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") OR ("do trong code snippets"))) OR ("locating bug core snippets"))*.