Perhaps you should try some spelling variations:
"world soils vivo studies" » "world soils vitro studies", "world spoils vivo studies", "world soil vivo studies", "cold soils vivo studies", "world soils vi studies", "world soils vii studies", "world soils bio studies"
"coupled soil book studies" » "coupled socio book studies", "coupled solid book studies", "coupled spin book studies", "coupled soi book studies", "coupled soil block studies", "coupled soil boron studies"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("world soils vivo studies") OR ("coupled soil book studies"))*.
• Removing quotes may allow a broader search: (( world soils vivo studies ) or ( coupled soil book studies ))*.