Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"viet trung ha snippets" » "viet trung hoc snippets", "viet trung tam snippets", "viet trung cap snippets", "viet trung ha slippers"
"using a java snippets" » "using _ java snippets", "using a java slippers"

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: "((((\"viet trung ha snippets\") OR (\"using a java snippets\"))) OR (\"locating bugs code snippets\"))~".
• Removing quotes may allow a broader search: (((( viet trung ha snippets ) OR ( using a java snippets ))) OR ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("viet trung ha snippets") OR ("using a java snippets"))) OR ("locating bugs code snippets"))*.