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