Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"using raw java snippets" » "using real java snippets", "using a java snippets", "using low java snippets"
"vi trong cong snippets" » "vai trong cong snippets", "voi trong cong snippets", "bi trong cong 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: "((((\"vi trong cong snippets\") OR (\"using raw java snippets\"))) OR (\"locating bugs code snippets\"))~".
• Removing quotes may allow a broader search: (((( vi trong cong snippets ) OR ( using raw java snippets ))) OR ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi trong cong snippets") OR ("using raw java snippets"))) OR ("locating bugs code snippets"))*.