Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"doc hieu lua snippets" » "toc thieu lua snippets", "hoc thieu lua snippets", "hoc hien lua snippets", "doc hieu luat snippets", "doc hieu qua snippets", "doc hieu luc snippets", "doc hieu lua 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: "((((\"doc hieu lua snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( doc hieu lua snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("doc hieu lua snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.