Try to make your search as simple as possible:
Kadsura will find all items including that sequence of letters.
Search results for "Kadsura":
"Ipomoea kadsura" - Piper kadsura
"Kadsura blancoi" - Phytocrene blancoi
"Kadsura grandiflora" - Schisandra grandiflora
"Kadsura roxburghiana" - Kadsura heteroclita