Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cua thuong » cua truong, cua phuong, ca thuong
cua khong » hua khong, cua phuong, cua cong
khao cuu » cham cuu, chao chu, kho cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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: khao cuu van - hanh trinh ((cua khong) OR (cua thuong)) cong tac toan tap~.
• Adding a wildcard symbol may retrieve word variants: khao cuu van - hanh trinh ((cua khong) or (cua thuong)) cong tac toan tap*.