Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
cua nhung » va nhung
luong tap » luong tai, cuong tap, luong tham
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((25 trieu) or (30 trieu)) tinh - ((hanh trang) OR (hanh trinh)) cua nhung luong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((25 trieu) OR (30 trieu)) tinh - ((hanh trang) OR (hanh trinh)) cua nhung luong tap toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((25 trieu) or (30 trieu)) tinh - ((hanh trang) OR (hanh trinh)) cua nhung luong tap toan cau".
• Adding a wildcard symbol may retrieve word variants: ((25 trieu) or (30 trieu)) tinh - ((hanh trang) OR (hanh trinh)) cua nhung luong tap toan cau*.