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 doc dao snippets" » "tri hoc dao snippets", "tri doi dao snippets", "tri dac dao snippets", "tri toc dao snippets", "tri duc dao snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using code snippets") OR ("tri doc dao snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( python using code snippets ) or ( tri doc dao snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using code snippets") or ("tri doc dao snippets"))) or ("locating bug core snippets"))*.