Perhaps you should try some spelling variations:
"trong toan do snippets" » "truong toan do snippets", "trong tan do snippets", "trong hoan do snippets", "trong toan ho snippets", "trong toan co snippets", "trong toan du snippets"
"using c code snippets" » "using lc code snippets", "using a code snippets", "using _ code snippets", "using cfd code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using c code snippets\") OR (\"trong toan do snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using c code snippets ) OR ( trong toan do snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using c code snippets") OR ("trong toan do snippets"))) OR ("locating bug code snippets"))*.