Perhaps you should try some spelling variations:
china loren » china lehren, china korea, china more
xuan thang » yuan chang, xiulan zhang
yuan cheng » yuan chang, huang cheng, yu cheng
china ren » china real, china reza, china r
wang yue » wong yue, wang hua, wang yan
dr wang » dr wong, mr wang, der zwang

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: ((xuan thang) OR (yuan cheng)) than ((china ren) OR (china loren)) (yan OR yang) dr wang yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((xuan thang) or (yuan cheng)) than ((china ren) OR (china loren)) (yan or yang) dr wang yue ;~".
• Adding a wildcard symbol may retrieve word variants: ((xuan thang) or (yuan cheng)) than ((china ren) OR (china loren)) (yan or yang) dr wang yue ;*.