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