Perhaps you should try some spelling variations:
cong thuong » hang thuong
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
dang phan » dung phan, nang phan, dang phat
chi hanh » chi nhanh, chi thanh, thi hanh
phan cau » phan dau, phan cac, phan tu
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi hanh - hanh trang cua ((cong trinh) or (cong thuong)) dang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi hanh - hanh trang cua ((cong trinh) OR (cong thuong)) dang phan cau.
• Adding a wildcard symbol may retrieve word variants: doi chi hanh - hanh trang cua ((cong trinh) or (cong thuong)) dang phan cau*.