Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
trinh toan » tinh toan, thanh toan, trinh quan
hieu lang » chieu sang, hieu quang, nhieu tang
truong ca » truong cao, truong va, trong ca
dung cong » dung trong
trinh han » trinh quan
ca dung » cao dung, cap dung, cu dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sang) or (hieu lang)) - thanh truong ca dung cong ((trinh toan) OR (trinh han)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sang) OR (hieu lang)) - thanh truong ca dung cong ((trinh toan) OR (trinh han)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sang) or (hieu lang)) - thanh truong ca dung cong ((trinh toan) OR (trinh han)) cau".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sang) or (hieu lang)) - thanh truong ca dung cong ((trinh toan) OR (trinh han)) cau*.