Perhaps you should try some spelling variations:
khien tinh » khien thich, bien tinh, dien tinh
thien tinh » thien minh, tien tinh, trien tinh
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
nhung cong » dung cong, thong cong, hang cong
tong cong » trong cong, cong cong, dung cong
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((khien tinh) OR (thien tinh)) - hanh doanh luan ((nhung cong) or (tong cong)) tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((khien tinh) OR (thien tinh)) - hanh doanh luan ((nhung cong) OR (tong cong)) tan tran cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((khien tinh) OR (thien tinh)) - hanh doanh luan ((nhung cong) or (tong cong)) tan tran cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((khien tinh) OR (thien tinh)) - hanh doanh luan ((nhung cong) or (tong cong)) tan tran cao*.