Perhaps you should try some spelling variations:
"dung chi trinh snippets" » "dung thi trinh snippets", "dung chi minh snippets", "dung chi binh snippets", "dung cho trinh snippets", "dung chien trinh snippets"
"dung co code slippers" » "dung cho code slippers", "dung cong code slippers", "dung cua code slippers", "dung cfd code slippers"
"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 chi trinh snippets") or ("dung co code slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung chi trinh snippets") OR ("dung co code slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung chi trinh snippets ) or ( dung co code slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung chi trinh snippets") or ("dung co code slippers"))) or ("locating bug code snippets"))*.