Perhaps you should try some spelling variations:
"dung co tranh slippers" » "dung co thanh slippers", "dung co trach slippers", "dung co trinh slippers", "dung cho tranh slippers", "dung cong tranh slippers", "dung cua tranh slippers", "dung co tranh slippery", "dung co tranh grippers"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che 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: (((("dung co tranh slippers") or ("dung cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung co tranh slippers") OR ("dung cac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung co tranh slippers ) or ( dung cac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung co tranh slippers") or ("dung cac code snippets"))) or ("locating bug code snippets"))*.