Perhaps you should try some spelling variations:
"using java code slippers" » "using data code slippers"
"tran manh hai snippets" » "tran minh hai snippets", "tran thanh hai snippets", "tran van hai snippets", "tran lanh hai snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs 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 slippers\") OR (\"tran manh hai snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code slippers ) OR ( tran manh hai snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code slippers") OR ("tran manh hai snippets"))) OR ("locating bug code snippets"))*.