Perhaps you should try some spelling variations:
pioneer days » pioneering days, pioneer years, longer days
tuan china » wuhan china, can china, taiwan china
tong shui » tong hui, cong shu, gong hui
tan chia » than china, can china, dan china
yang jie » yang di, yang jui, yang xi
yang jin » yang jun, ying jin, shang jin

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: pioneer days ((tan chia) OR (tuan china)) dan ((yang jie) OR (yang jin)) tong shui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "pioneer days ((tan chia) OR (tuan china)) dan ((yang jie) or (yang jin)) tong shui ;~".
• Adding a wildcard symbol may retrieve word variants: pioneer days ((tan chia) OR (tuan china)) dan ((yang jie) or (yang jin)) tong shui ;*.