Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
chinh tai » chinh tri
cong tinh » cong trinh, cong vinh, long tinh
chinh va » chinh ta, hanh va, tinh va
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: doi chieu xanh - hanh ((chinh va) or (chinh tai)) nhung cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh ((chinh va) OR (chinh tai)) nhung cong tinh toan cau*.