Perhaps you should try some spelling variations:
tranh cua » doanh cua, manh cua
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
chi tinh » chai tinh, chi minh, chi binh
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi tinh - canh tranh cua ((tong cong) or (cong cong)) van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi tinh - canh tranh cua ((tong cong) OR (cong cong)) van toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi tinh - canh tranh cua ((tong cong) or (cong cong)) van toan cao*.