Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
hoc hiem » hoc thieu, hoc thiet, hoc nhiet
van toan » van tuan, van tan, van thanh
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: ((hoc hiem) OR (hoc hien)) ngan - hanh tranh cua ((nhung cong) or (tong cong)) van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hiem) OR (hoc hien)) ngan - hanh tranh cua ((nhung cong) OR (tong cong)) van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hiem) OR (hoc hien)) ngan - hanh tranh cua ((nhung cong) or (tong cong)) van toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc hiem) OR (hoc hien)) ngan - hanh tranh cua ((nhung cong) or (tong cong)) van toan cao*.