Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
hiem ngan » kim ngan, viem gan
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
hoc hiem » hoc hien, hoc thieu, hoc thiet
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 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 ngan - hanh tranh cua ((nhung cong) OR (tong cong)) van toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hiem ngan - hanh tranh cua ((nhung cong) or (tong cong)) van toan cao*.