Perhaps you should try some spelling variations:
sieu lang » hieu lang, sieu van, lieu nang
sieu nang » lieu nang, lieu nano, sieu van
canh manh » lanh manh, canh tranh, cach mang
cua thong » cua thuong, cua khong, cua tong
manh cua » doanh cua, ban cua
cong tac » cong ty
phan dau » phan tu, hang dau

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: hoc ((sieu lang) OR (sieu nang)) - canh manh cua thong ((cong san) OR (cong tac)) phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sieu lang) OR (sieu nang)) - canh manh cua thong ((cong san) or (cong tac)) phan dau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((sieu lang) OR (sieu nang)) - canh manh cua thong ((cong san) or (cong tac)) phan dau*.