Perhaps you should try some spelling variations:
doanh chung » doanh thuong, doan hung, doanh chuoi
doanh nhung » doanh thuong, doanh nhan, doan hung
hieu quang » thieu quang, hieu quan, hieu qua
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, nhieu tang, hieu van
cong tinh » cong trinh, cong vinh, long tinh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (hieu quang)) - hanh trung ((doanh chung) OR (doanh nhung)) cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - hanh trung ((doanh chung) OR (doanh nhung)) cong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu quang)) - hanh trung ((doanh chung) OR (doanh nhung)) cong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu quang)) - hanh trung ((doanh chung) OR (doanh nhung)) cong tinh toan cau*.