Perhaps you should try some spelling variations:
so doanh » so danh, su doanh, hoa doanh
dang hai » dang khai, hang hai, dung hai
doanh ly » doanh va, dinh ly, doanh _
cau treo » cau theo, cau tren, cau triet
mai hoi » mai khoi, dai hoi, lai hoi
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
va dang » van dang, va nang, va lang
ly nang » ky nang, ly hang, ly vang
hai cau » hai chau, hai chu, hai hau
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so doanh ly nang ((ma hoi) or (mai hoi)). hieu ((van cam) OR (van cau)) truc va dang hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so doanh ly nang ((ma hoi) OR (mai hoi)). hieu ((van cam) OR (van cau)) truc va dang hai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so doanh ly nang ((ma hoi) or (mai hoi)). hieu ((van cam) OR (van cau)) truc va dang hai cau treo".
• Adding a wildcard symbol may retrieve word variants: so doanh ly nang ((ma hoi) or (mai hoi)). hieu ((van cam) OR (van cau)) truc va dang hai cau treo*.