Perhaps you should try some spelling variations:
quang khang » quang khanh, quang thanh, quang khai
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
dang cong » dung cong
khang cau » hang cau, khang cu, khang chan
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - canh tranh cua ((nhung cong) or (dang cong)) quang khang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - canh tranh cua ((nhung cong) OR (dang cong)) quang khang cau.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - canh tranh cua ((nhung cong) or (dang cong)) quang khang cau*.