Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh doanh » hang doanh, chinh doanh, doanh doanh
ngang toan » nganh toan, quang toan
doi chieu » doc hieu, doi chi, ho chieu
luan tong » luan tuong, luan dong, luan nong
luan cong » luat cong, luong cong, luan chung
dang toan » dang tran, dan toan, dung toan

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: doi chieu tinh - hanh doanh ((luan tong) OR (luan cong)) cong ((ngang toan) OR (dang toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - hanh doanh ((luan tong) OR (luan cong)) cong ((ngang toan) or (dang toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - hanh doanh ((luan tong) OR (luan cong)) cong ((ngang toan) or (dang toan)) cau*.