Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
trong long » trong luong, truong long, trong nong
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
toan cau » toan cao, toan ban, toan tap

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 nganh - ((hanh tranh) OR (hanh trinh)) cua ((trong cong) or (trong long)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - ((hanh tranh) OR (hanh trinh)) cua ((trong cong) OR (trong long)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - ((hanh tranh) OR (hanh trinh)) cua ((trong cong) or (trong long)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - ((hanh tranh) OR (hanh trinh)) cua ((trong cong) or (trong long)) manh toan cau*.