Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
cong toan » cong tan, cong hoan, cong tuan
chi xanh » chi anh, chi danh, chi hanh
toan cao » toan ban, toan tap
doi chi » doi khi
va tong » va thong, va tuong, va trong

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 - ((canh tranh) or (hanh trinh)) va tong cong cong toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((canh tranh) OR (hanh trinh)) va tong cong cong toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((canh tranh) or (hanh trinh)) va tong cong cong toan cao*.