Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
dang cong » dung cong
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
ho cuu » ho chu, ho cua, so cuu

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 cuu tinh - hanh trinh vat ((nhung cong) OR (dang cong)) dan ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: ho cuu tinh - hanh trinh vat ((nhung cong) or (dang cong)) dan ((toan cau) or (toan ban))*.