Perhaps you should try some spelling variations:
tinh luong » tinh huong, dinh luong, minh luong
dang quang » dung quang, nang quan
luong xuan » luong quan, luong quang, luong cua
dang hung » manh hung, dang cong, van hung
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
xuan va » xuat va, luan va, quan va
va kiem » van kien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh ((dang quang) or (dang hung)) van hieu soat ) or ( tinh luong xuan va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh ((dang quang) OR (dang hung)) van hieu soat ) OR ( tinh luong xuan va kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh ((dang quang) or (dang hung)) van hieu soat ) or ( tinh luong xuan va kiem soat ))*.