Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
nhung cong » dung cong, thong cong, hang cong
hoc khien » hoc hien, hoc nghien, hoc thieu
tong cong » trong cong, cong cong, dung cong
trang cho » trong cho, trang o, sang cho
tran cao » toan cao, tran chau, tranh cac

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