Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets", "using java java slippers"
"trinh dan thi snippets" » "trinh han thi snippets", "trinh van thi snippets", "trinh san thi snippets", "trinh dang thi snippets", "trinh tran thi snippets", "trinh dinh thi snippets", "trinh dan thi slippers"
"locating bug code snippets" » "locating bug code slippers", "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: "((((\"trinh dan thi snippets\") OR (\"using java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh dan thi snippets ) OR ( using java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh dan thi snippets") OR ("using java java snippets"))) OR ("locating bug code snippets"))*.