Perhaps you should try some spelling variations:
"coder zhang yang precoder program" » "coder zhang yang proder program" (Expand search), "coder zhang yang recovery program" (Expand search), "coder zhang yang precoce programa" (Expand search), "coder zhang and precoder program" (Expand search), "coder zhang ying precoder program" (Expand search), "poder zhang yang prepoder program" (Expand search), "codes zhang yang precodes program" (Expand search), "coded zhang yang precoded program" (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), "rpa python 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 zhang yang precoder program") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder zhang yang precoder program\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder zhang yang precoder program ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder zhang yang precoder program") OR ("api python python python programming"))*.