Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
hieu quang » thieu quang, hieu qua, diep quang
nhung hung » nhung huong, nhung dung, nhung vung
hieu quan » hieu qua, lieu quan, thien quan
hung manh » nhung manh, hung anh, tung manh
manh toan » thanh toan, anh tuan, tinh toan
toan tap » toan ban

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: doi ((hieu quang) OR (hieu quan)) - ((hanh tranh) OR (canh tranh)) va nhung hung manh toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu quang) OR (hieu quan)) - ((hanh tranh) or (canh tranh)) va nhung hung manh toan tap~".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu quang) OR (hieu quan)) - ((hanh tranh) or (canh tranh)) va nhung hung manh toan tap*.