Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"
"van luong dao snippets" » "van duong dao snippets", "van cuong dao snippets", "nang luong dao snippets", "van truong dao snippets", "van luong giao 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 luong dao snippets\") OR (\"using java java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( van luong dao snippets ) OR ( using java java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van luong dao snippets") OR ("using java java snippets"))) OR ("locating bug core snippets"))*.