Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
chieu sang » chieu sach, chieu xanh, hieu lang
nang luong » nang song
trinh toan » tinh toan, thanh toan, trinh han
luong cua » huong cua, long cua, luong quan
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
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: ho ((hieu quang) or (chieu sang)) - nang luong cua hang cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (chieu sang)) - nang luong cua hang cong trinh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (chieu sang)) - nang luong cua hang cong trinh toan cau*.