Perhaps you should try some spelling variations:
learning learning » learning teaching, measuring learning, learning during
teaching learning » machine learning
wang learning » long learning, change learning, making learning
gao yang » yao yang, gao ying, tao yang
yang jin » yang jie, yang jun, ying jin
jin kang » jin chang, jin kyung, jing fang
kang hai » dang hai, kang han, shang hai
tony h » tony a, tony j
h gao » _ gao

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: ((wang learning) OR (((learning learning) OR (teaching learning)))) tony h gao yang jin kang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang learning) or (((learning learning) OR (teaching learning)))) tony h gao yang jin kang hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang learning) or (((learning learning) OR (teaching learning)))) tony h gao yang jin kang hai ;*.