Perhaps you should try some spelling variations:
"coder precoder leiden visual programming" » "coder precoder leiden fetal programming" (Expand search), "coder decoder leiden visual programming" (Expand search), "coder precoder guided visual programming" (Expand search), "coder precoder lei visual programming" (Expand search), "coder precoder video visual programming" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder precoder leiden visual programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder leiden visual programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder leiden visual programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder leiden visual programming") OR ("api python python python programming"))*.