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 noi dau snippets" » "tri doi dau snippets", "tri moi dau snippets", "tri ngoai dau snippets", "tri noi da snippets", "tri goi dau 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 noi dau 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 noi dau snippets\"))) OR (\"locating bug core snippets\"))*".
• Removing quotes may allow a broader search: (((( python using code snippets ) OR ( tri noi dau snippets ))) OR ( locating bug core snippets ))*.