Perhaps you should try some spelling variations:
hanh trinh » canh tranh
trinh toan » tinh toan, thanh toan, trinh han
hiem ngan » kim ngan, viem gan
dang cong » dung cong
doc hiem » doc hieu, hoc hien, doc viet
cua dang » cua cong, cua ban
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: doc hiem ngan - ((hanh trinh) or (hanh chinh)) cua dang cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hiem ngan - ((hanh trinh) OR (hanh chinh)) cua dang cong trinh toan cau.
• Adding a wildcard symbol may retrieve word variants: doc hiem ngan - ((hanh trinh) or (hanh chinh)) cua dang cong trinh toan cau*.