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