Perhaps you should try some spelling variations:
"doanh doanh duoc snippets" » "toan doanh duoc snippets", "doanh hoan duoc snippets", "doanh thanh duoc snippets", "doanh doanh cuoc snippets", "doanh doanh quoc snippets", "doanh dong duoc snippets", "doanh doanh duoc slippers"
"using c code snippets" » "using lc code snippets", "using a code snippets", "using _ code snippets", "using cfd code snippets", "using c code slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("using c code snippets") or ("doanh doanh duoc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using c code snippets") OR ("doanh doanh duoc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using c code snippets ) or ( doanh doanh duoc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using c code snippets") or ("doanh doanh duoc snippets"))) or ("locating bug code snippets"))*.