Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
hoi hieu » hoi phieu, hoi tieu, moi hieu
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - canh manh cua dung cong ((tan toan) OR (tap toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - canh manh cua dung cong ((tan toan) OR (tap toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - canh manh cua dung cong ((tan toan) OR (tap toan)) cao*.