Perhaps you should try some spelling variations:
thien chinh » tien thinh, thien chien, thi chinh
hanh trinh » canh tranh, hanh chinh
hien hanh » dieu hanh
trinh te » trinh tu, trinh he, trinh ke
van toan » van tuan, van thanh, manh toan
te dung » tieu dung, tien dung, tin dung
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien chinh) or (hien hanh)) - hanh trinh te dung trong ((van toan) or (van tan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chinh) OR (hien hanh)) - hanh trinh te dung trong ((van toan) OR (van tan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien chinh) or (hien hanh)) - hanh trinh te dung trong ((van toan) or (van tan)) cao*.