Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
tung cao » nung cao, truong cao, trung cap
ung cong » dung cong, luong cong, duong cong
san toan » van toan, manh toan, xuan toan
dan toan » van toan, dan than, manh toan
cao ung » cao dung, cac ung, cho ung

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 - thanh tung cao ung cong ((san toan) OR (dan toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - thanh tung cao ung cong ((san toan) OR (dan toan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh tung cao ung cong ((san toan) OR (dan toan)) cau*.