Perhaps you should try some spelling variations:
studying social » study social
social pioneer » social pioneers, social power, social planner
pioneer days » pioneering days, pioneer years, longer days
huang ying » huang jing, huang ting, huang yang
yang july » yang judy, yang jun
yang jui » yang judy, yang di, yang xi
wai yan » wang yan, wei yang

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: ((wai yan) OR (huang ying)) ((yang jui) OR (yang july)) when studying social pioneer days ;~.
• Adding a wildcard symbol may retrieve word variants: ((wai yan) or (huang ying)) ((yang jui) or (yang july)) when studying social pioneer days ;*.