Perhaps you should try some spelling variations:
tranh cua » doanh cua, manh cua
dong cong » duong cong, dung cong, cong cong
dang cong » dung cong
dong cua » dung cua, cong cua, huong cua
cua sinh » hoa sinh, va sinh
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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: dong cua sinh - canh tranh cua ((dong cong) OR (dang cong)) danh ((toan tai) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: dong cua sinh - canh tranh cua ((dong cong) or (dang cong)) danh ((toan tai) or (toan cao))*.