Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
cong thanh » dong thanh, cong trinh, cong tan
chao chua » chao chu, cha chua, chay chua
chua nang » chuc nang, chua xang, kha nang
dang luan » tang luan, hang luan, dan luan
tong cong » trong cong, cong cong, dung cong
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao chua nang - anh ((dang luan) or (dung luan)) tong cong thanh phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao chua nang - anh ((dang luan) OR (dung luan)) tong cong thanh phan dau.
• Adding a wildcard symbol may retrieve word variants: chao chua nang - anh ((dang luan) or (dung luan)) tong cong thanh phan dau*.