Perhaps you should try some spelling variations:
"dung nhat doanh slippers" » "dung nhap doanh slippers", "dung nhat danh slippers", "dung nha doanh slippers", "dung nhan doanh slippers", "dang nhat doanh slippers", "dung nhat doanh slippery", "dung nhat doanh grippers"
"using ibm code snippets" » "using rbf code snippets", "using lbm code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using ibm code snippets") or ("dung nhat doanh slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using ibm code snippets") OR ("dung nhat doanh slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using ibm code snippets ) or ( dung nhat doanh slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using ibm code snippets") or ("dung nhat doanh slippers"))) or ("locating bug code snippets"))*.