Perhaps you should try some spelling variations:
"locating bugs code slippers" » "locating bugs code snippets", "locating bug code slippers"
"using java java snippets" » "using data java snippets"
"van cuong va snippets" » "van chuong va snippets", "van duong va snippets", "van cong va snippets", "van luong va 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 (\"van cuong va snippets\"))) OR (\"locating bugs code slippers\"))~".
• Removing quotes may allow a broader search: (((( using java java snippets ) OR ( van cuong va snippets ))) OR ( locating bugs code slippers ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") OR ("van cuong va snippets"))) OR ("locating bugs code slippers"))*.