Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, thong thong, phong chong
tieu xanh » tieu danh, chieu xanh, dieu hanh
trinh vat » trinh van, trinh luat, sinh vat
tong cong » trong cong, cong cong, dung cong
toan cao » toan tap
toan ban » van 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: theo tieu xanh - hanh trinh vat ((thong cong) OR (tong cong)) tap ((toan cao) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh trinh vat ((thong cong) or (tong cong)) tap ((toan cao) or (toan ban))*.