Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van duong du snippets" » "van duong code snippets", "van dong du snippets", "van dung du snippets", "van phong du snippets", "van duong duc snippets", "van duong di 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: "((((\"van duong du snippets\") OR (\"using java java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( van duong du snippets ) OR ( using java java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van duong du snippets") OR ("using java java snippets"))) OR ("locating bug core snippets"))*.