Perhaps you should try some spelling variations:
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
hanh trinh » canh tranh, hanh chinh
hieu xanh » chieu xanh, hieu manh, dieu hanh
tong cong » trong cong, cong cong, dung cong
trinh ha » trinh han, trinh hoa, trinh nha
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
ha tong » han tong, ha dong, ha tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (((hieu nganh) OR (vien nganh)))) - hanh trinh ha tong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (((hieu nganh) OR (vien nganh)))) - hanh trinh ha tong cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (((hieu nganh) OR (vien nganh)))) - hanh trinh ha tong cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (((hieu nganh) OR (vien nganh)))) - hanh trinh ha tong cong dan than cau*.