Perhaps you should try some spelling variations:
"thi viet code snippets" » "thi viet co snippets", "thi viet some snippets", "thi lien code 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"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("thi 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: (((("thi viet code snippets") OR ("dung cfd code snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( thi viet code snippets ) or ( dung cfd code snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("thi viet code snippets") or ("dung cfd code snippets"))) or ("locating bug code slippers"))*.