Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
hieu quang » thieu quang, hieu quan, hieu qua
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu van, biet lang
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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 lang) OR (nhieu tang))) or (hieu quang)) - thanh trung cua thong cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu lang) OR (nhieu tang))) OR (hieu quang)) - thanh trung cua thong cong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((hieu lang) OR (nhieu tang))) or (hieu quang)) - thanh trung cua thong cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu lang) OR (nhieu tang))) or (hieu quang)) - thanh trung cua thong cong tan than cau*.