Perhaps you should try some spelling variations:
"vu trong code snippets" » "vu trong cong snippets", "vu trong co snippets", "vu trong che snippets", "tu trong code snippets", "le trong code snippets", "ly trong code snippets"
"using raw java snippets" » "using real java snippets", "using a java snippets", "using low java 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: "((((\"vu trong code snippets\") OR (\"using raw java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( vu trong code snippets ) OR ( using raw java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vu trong code snippets") OR ("using raw java snippets"))) OR ("locating bug core snippets"))*.