Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets", "using java java slippers"
"vi ung khoa snippets" » "vi dung khoa snippets", "vi rung khoa snippets", "vi ung hoa snippets", "va ung khoa snippets", "vi luong khoa snippets", "vi trung khoa snippets", "vi ung khoa 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: "((((\"using java java snippets\") OR (\"vi ung khoa snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java java snippets ) OR ( vi ung khoa snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") OR ("vi ung khoa snippets"))) OR ("locating bug code snippets"))*.