Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cong tinh » cong trinh, cong vinh, long tinh
tra thuy » tran thuy, ta thuy, thai thuy
tra thuc » tri thuc, trang thuc, toan thuc
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: theo hieu lang - thanh ((tra thuy) OR (tra thuc)) nhung cong tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - thanh ((tra thuy) OR (tra thuc)) nhung cong tinh toan cau*".