Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh chua » trinh chuan, trinh cua, trinh chu
chua bang » chu bang, chua nang, chua xang
cong sanh » cong danh, cong sach, cong thanh
chi xanh » chi anh, chi danh, chi hanh
cong san » cong tac
toan cao » toan ban, toan tap
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 xanh - hanh trinh chua bang ((cong sanh) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - hanh trinh chua bang ((cong sanh) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh trinh chua bang ((cong sanh) or (cong san)) toan cao*.