Perhaps you should try some spelling variations:
"plant proceeding series ;" » "plant proceedings series ;", "plant processing series ;", "plant bioprocessing series ;", "plants proceedings series ;", "planet proceedings series ;"
"plant breeding systems ;" » "plant feeding systems ;", "plant building systems ;", "plant trading systems ;", "plant feeding systemss ;"
"plant breeding system ;" » "plant feeding system ;", "plant feeding systems ;"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("plant proceeding series ;") or ((("plant breeding system ;") or ("plant breeding systems ;"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("plant proceeding series ;") OR ((("plant breeding system ;") OR ("plant breeding systems ;")))).
• Removing quotes may allow a broader search: (( plant proceeding series ; ) or ((( plant breeding system ; ) or ( plant breeding systems ; )))).
• Adding a wildcard symbol may retrieve word variants: (("plant proceeding series ;") or ((("plant breeding system ;") or ("plant breeding systems ;"))))*.