Perhaps you should try some spelling variations:
hanh trinh » canh tranh
hieu quang » thieu quang, hieu qua, diep quang
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
cua nhung » va nhung
cong hoa » dong hoa, dong hoc, hang hoa
hoa phan » hoa dan, co phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) or (hieu quan)) - ((hanh trinh) OR (hanh chinh)) cua nhung cong hoa phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu quan)) - ((hanh trinh) OR (hanh chinh)) cua nhung cong hoa phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) or (hieu quan)) - ((hanh trinh) OR (hanh chinh)) cua nhung cong hoa phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (hieu quan)) - ((hanh trinh) OR (hanh chinh)) cua nhung cong hoa phan cau*.