Perhaps you should try some spelling variations:
"coder coder coding bivariate probit" » "coder coder using bivariate probit" (Expand search), "coder coder on bivariate probit" (Expand search), "coder coder coding variants probit" (Expand search), "coder modern coding bivariate probit" (Expand search), "coder color coding bivariate probit" (Expand search), "coder odor coding bivariate probit" (Expand search), "coder decoder coding bivariate probit" (Expand search), "code code coding bivariate probit" (Expand search), "decoder codec coding bivariate probit" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ python programming" (Expand search)

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: "((\"coder coder coding bivariate probit\") OR (\"on python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder coding bivariate probit ) OR ( on python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder coding bivariate probit") OR ("on python python python programming"))*.