Perhaps you should try some spelling variations:
"dung thu trinh slippers" » "dung thi trinh slippers", "dung tho trinh slippers", "dung thu tinh slippers", "ung thu trinh slippers", "dung phu trinh slippers", "dung thu trinh slippery", "dung thu trinh grippers"
"dung cfd code snippets" » "dung cho code snippets", "dung cua code snippets", "dung co code snippets", "dung cfd core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

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

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