Perhaps you should try some spelling variations:
"using ibm code slippers" » "using rbf code slippers", "using lbm code slippers"
"dung ung ung snippets" » "dung trung ung snippets", "dung quang ung snippets", "dung chung ung snippets", "dung dung ung snippets", "dcung ung ung snippets", "dhuong ung ung 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 slippers") or ("dung ung ung snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using ibm code slippers") OR ("dung ung ung snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using ibm code slippers") or ("dung ung ung snippets"))) or ("locating bug code snippets"))*.