Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
chieu tinh » trieu tinh, lieu tinh, kieu tinh
canh doanh » hanh doanh, chinh doanh, kinh doanh
trinh quan » tinh quang, trinh luat, trinh han
chau tinh » cuu tinh, ha tinh, cua tinh
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
quan cau » quang cao, toan cau, quan ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu tinh) OR (chau tinh)) - ((canh doanh) or (doanh doanh)) luan dung cong trinh quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu tinh) OR (chau tinh)) - ((canh doanh) OR (doanh doanh)) luan dung cong trinh quan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu tinh) OR (chau tinh)) - ((canh doanh) or (doanh doanh)) luan dung cong trinh quan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu tinh) OR (chau tinh)) - ((canh doanh) or (doanh doanh)) luan dung cong trinh quan cau*.