Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong hoach » cong hoa, cong hoan, cong sach
hoach toan » hach toan
doi chieu » doc hieu, ho chieu, mot chieu
tranh va » tranh van, trinh va, thanh va
trang va » tran van, hang va
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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: ((doi chieu) OR (doi chi)) sang - hanh ((tranh va) OR (trang va)) nhung cong hoach toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doi chi)) sang - hanh ((tranh va) or (trang va)) nhung cong hoach toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doi chi)) sang - hanh ((tranh va) or (trang va)) nhung cong hoach toan cau*.