Perhaps you should try some spelling variations:
"dang tran viet snippets" » "dang thanh viet snippets", "quang tran viet snippets", "hoang tran viet snippets", "dang trien viet snippets", "dang gian viet snippets", "dang san viet snippets"
"using c code snippets" » "using lc code snippets", "using a code snippets", "using _ code snippets", "using cfd 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: (((("using c code snippets") or ("dang tran viet snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using c code snippets") OR ("dang tran viet snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( using c code snippets ) or ( dang tran viet snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("using c code snippets") or ("dang tran viet snippets"))) or ("locating bug code slippers"))*.