Perhaps you should try some spelling variations:
"huong doan do snippets" » "phuong doan do snippets", "huong dan do snippets", "huong loan do snippets", "huong doan o snippets", "huong toan do snippets", "huong doanh dao snippets"
"using ibm code snippets" » "using rbf code snippets", "using lbm code 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 ibm code snippets\") OR (\"huong doan do snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using ibm code snippets ) OR ( huong doan do snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") OR ("huong doan do snippets"))) OR ("locating bug code snippets"))*.