Perhaps you should try some spelling variations:
tuning system » funding system, using system, training system
zhang ping » zhang ming, zhang jing, zhang ting
li tuning » iii tuning, pid tuning, _ tuning
wei yang » pei yang, wei wang, wei yang's
yang xi » yang jui
yang yi » yang jui
ping yi » ming yi, ping yu, jiang yi
yi ying » li ying, yi jing, yi ning
ying li » ling li, yang li, yin li

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: ((wei yang) OR (((((yang xi) OR (yang yi))) OR (yang di)))) zhang ping yi ying li tuning system ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wei yang) or (((((yang xi) OR (yang yi))) or (yang di)))) zhang ping yi ying li tuning system ;~".
• Adding a wildcard symbol may retrieve word variants: ((wei yang) or (((((yang xi) OR (yang yi))) or (yang di)))) zhang ping yi ying li tuning system ;*.