Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
phan cong » thanh cong
manh toan » thanh toan, anh tuan, tinh toan
ban cong » bang cong, van cong, ban huong
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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 hieu lang - ((hanh trinh) OR (canh tranh)) quan ((ban cong) OR (phan cong)) manh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh trinh) or (canh tranh)) quan ((ban cong) OR (phan cong)) manh toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh trinh) or (canh tranh)) quan ((ban cong) OR (phan cong)) manh toan cau*.