Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » chieu sang, hieu quang, nhieu tang
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
doi hieu » doi chieu, doc hieu, doi hien
manh cua » doanh cua, ban cua
phan cau » phan dau, phan cac, phan tu
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - lanh manh cua nhung cong thanh ((phan cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - lanh manh cua nhung cong thanh ((phan cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - lanh manh cua nhung cong thanh ((phan cau) or (than cap))*.