Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
dang cong » dung cong
hanh san » thanh san, khach san, thanh son
hang ban » hang luan, hang va, hang dau
hang tai » hang va, dung tai
cua dang » cua cong, cua ban
toan cau » toan cao, toan ban, toan tap
chao ho » cho ho, chao chao, chat hoa

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: chao ho manh - ((hanh san) OR (((hang ban) OR (hang tai)))) cua dang cong trinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ho manh - ((hanh san) or (((hang ban) OR (hang tai)))) cua dang cong trinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: chao ho manh - ((hanh san) or (((hang ban) OR (hang tai)))) cua dang cong trinh toan cau*.