Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dien toan » dien thanh, dien thoai, dien hoa
ho chieu » theo chieu, hoc thieu, doi chieu
dan than » dan chan, ban than, van than

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: ho chieu tinh - canh tranh cua nhung cong ((((dien toan) OR (xuan toan))) OR (dan than)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - canh tranh cua nhung cong ((((dien toan) or (xuan toan))) or (dan than)) cau*.