Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » hang cong, nhung don, nhung lang
thong cong » trong cong, tong cong, thong thong
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » doanh cua, manh cua
dung cong » dung trong
van tan » van tuan, van ban, van tai
tan cao » toan cao, tao cao, tay cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh tranh cua ((((nhung cong) OR (dung cong))) OR (thong cong)) van tan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - hanh tranh cua ((((nhung cong) OR (dung cong))) or (thong cong)) van tan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh tranh cua ((((nhung cong) OR (dung cong))) or (thong cong)) van tan cao*.