Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets"
"locating bug core snippets" » "locating bug code snippets"
"tri cac dao snippets" » "tri mac dao snippets", "tai cac dao snippets", "tri dac dao snippets", "tri cac dan snippets", "tri ca dao snippets", "tri cac dai snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using code snippets") OR ("tri cac dao snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using code snippets\") OR (\"tri cac dao snippets\"))) OR (\"locating bug core snippets\"))*".
• Removing quotes may allow a broader search: (((( python using code snippets ) OR ( tri cac dao snippets ))) OR ( locating bug core snippets ))*.