Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dung cao thi snippets" » "duong cao thi snippets", "dung cho thi snippets", "dung co thi snippets", "dung cau thi snippets", "dung cao tai snippets", "dung dao thi snippets"
"locating bug core snippets" » "locating bug code 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 code snippets\") OR (\"dung cao thi snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( dung cao thi snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("dung cao thi snippets"))) OR ("locating bug core snippets"))*.