Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
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 cua cong 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 cua cong luong tap toan cau".
• Adding a wildcard symbol may retrieve word variants: ((25 trieu) OR (30 trieu)) tinh - hanh trang cua cong luong tap toan cau*.