Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong chung
truong long » trong long, trung long, truong dong
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh mang » nhanh mang, hanh trang, nhanh lang
doc hieu » toc thieu, hoc thieu, hoc hien
mang cua » manh cua, dung cua, ban cua
toan ban » van ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh mang cua ((truong cong) OR (truong long)) tinh toan ban~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh mang cua ((truong cong) OR (truong long)) tinh toan ban*.