Perhaps you should try some spelling variations:
wang sampling » ring sampling, plant sampling, a sampling
sampling data » sample data
sang minh » kang minah, anh minh, song min
song ming » song bing, song min, gong min
data hua » data hub, data human, data how
hong ghi » zhong zhi, hong g, hong hai
hua ren » hua chen

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang sampling data hua ren ((sang minh) or (song ming)) hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang sampling data hua ren ((sang minh) OR (song ming)) hong ghi ;.
• Adding a wildcard symbol may retrieve word variants: wang sampling data hua ren ((sang minh) or (song ming)) hong ghi ;*.