Perhaps you should try some spelling variations:
"scientists using guidance." » "scientists china guidance.", "scientists united guidance.", "scientists must guidance.", "scientists homing guidance.", "scientists farming guidance."
"sciences china guidance." » "sciences child guidance.", "sciences china abundance.", "sciences china guide."
"science china guidance." » "science child guidance.", "science china abundance.", "science china guide.", "science teaching guidance."

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: (("scientists using guidance.") or ((("sciences china guidance.") OR ("science china guidance."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("scientists using guidance.") OR ((("sciences china guidance.") OR ("science china guidance.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"scientists using guidance.\") or (((\"sciences china guidance.\") OR (\"science china guidance.\"))))".
• Removing quotes may allow a broader search: (( scientists using guidance. ) or ((( sciences china guidance. ) OR ( science china guidance. )))).
• Adding a wildcard symbol may retrieve word variants: (("scientists using guidance.") or ((("sciences china guidance.") OR ("science china guidance."))))*.