Perhaps you should try some spelling variations:
china jing » china jiing, china ying, china going
long trip » longer trip, long tail, longer trips
trip tan » trip bank, trip tik
chia jin » chia lan, chia wen
ying jin » yang jin, jing ji, yang jie
wang hui » wang hua, wang zhi, wang wei
gong hui » tong hui, tong shui, gong si

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: long trip tan ((chia jin) OR (china jing)) ying jin ((wang hui) OR (gong hui)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "long trip tan ((chia jin) OR (china jing)) ying jin ((wang hui) or (gong hui)) ;~".
• Adding a wildcard symbol may retrieve word variants: long trip tan ((chia jin) OR (china jing)) ying jin ((wang hui) or (gong hui)) ;*.