Perhaps you should try some spelling variations:
tinh khong » tinh khang, tinh huong, benh khong
khong cong » thong cong, khong cang, chong cong
quan dang » quang dang, quan dong, tuan dang
quan lang » quan hoang, gian lang, quan luan
hieu soat » hieu suat, hieu hoat, hieu luat
hien soat » thien hoat, kiem soat, bien soan
van hieu » cao hieu
cong san » cong tac
san hien » van hien, han hien, van chien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh ((quan dang) or (quan lang)) van hieu soat ) or ( tinh khong cong san hien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh ((quan dang) OR (quan lang)) van hieu soat ) OR ( tinh khong cong san hien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh ((quan dang) or (quan lang)) van hieu soat ) or ( tinh khong cong san hien soat ))*.