Perhaps you should try some spelling variations:
nhung phuong » dung phuong, truong phuong, bang phuong
hieu quang » thieu quang, hieu quan, hieu qua
nhu phuong » thu phuong, thi phuong, thu huong
hieu lang » chieu sang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
dan phan » doan phan, dan chan, van 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 lang) or (hieu quang)) - canh tranh cua ((nhung phuong) OR (nhu phuong)) dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - canh tranh cua ((nhung phuong) OR (nhu phuong)) dan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu quang)) - canh tranh cua ((nhung phuong) OR (nhu phuong)) dan phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu quang)) - canh tranh cua ((nhung phuong) OR (nhu phuong)) dan phan cau*.