Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
van tan » van tuan, van ban, van thanh
van tai » von tai, van tuan

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: toc thieu xanh - hanh tranh cua nhung cong ((tinh toan) OR (((van tan) OR (van tai)))) cau~.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh tranh cua nhung cong ((tinh toan) or (((van tan) or (van tai)))) cau*.