Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"using bo cong snippets" » "using both cong snippets", "using low cong snippets", "using two cong snippets", "using so cong snippets", "using cao cong snippets", "using hoc cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 bo cong snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using bo cong snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using bo cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.