Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
cong quang » luong quang, thong quang, duong quang
quang tuan » quang thanh, quan luan, quang cua
hieu tang » hieu lang, hieu tieng, kieu trang
trung cap » truong cao
dung cong » dung trong
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: nha ((hieu tang) or (nhieu tang)) - thanh ((trung cap) OR (trung tam)) dung cong quang tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nha ((hieu tang) OR (nhieu tang)) - thanh ((trung cap) OR (trung tam)) dung cong quang tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nha ((hieu tang) or (nhieu tang)) - thanh ((trung cap) OR (trung tam)) dung cong quang tuan cau".
• Adding a wildcard symbol may retrieve word variants: nha ((hieu tang) or (nhieu tang)) - thanh ((trung cap) OR (trung tam)) dung cong quang tuan cau*.