Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"vu truong cao snippets" » "vu truong code snippets", "vu truong dai snippets", "vu trong cao snippets", "vu thuong cao snippets", "va truong cao 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: "((((\"using java java snippets\") OR (\"vu truong cao snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java java snippets ) OR ( vu truong cao snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") OR ("vu truong cao snippets"))) OR ("locating bug core snippets"))*.