Perhaps you should try some spelling variations:
"tran viet code snippets" » "trien viet code snippets", "gian viet code snippets", "san viet code snippets", "tran viet co snippets", "tran viet some snippets"
"dung cfd code snippets" » "dung cho code snippets", "dung cua code snippets", "dung co code snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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