Perhaps you should try some spelling variations:
trinh dang » trinh dung, trinh dan, trinh bang
dang hung » dang quang, manh hung, dang cong
hieu suat » hieu qua
hieu luat » hieu qua
tich nang » tich van, tin nang
nang quan » ban quan, nang suat
quan binh » quang binh, quang ninh, quang minh
binh hien » minh hien, kinh hien, dinh hien
hien soat » thien hoat, kiem soat, bien soan
hung van » phung van, nhung van, dung van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh dang hung van ((hieu suat) or (hieu luat)) ) or ( tich nang quan binh hien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dang hung van ((hieu suat) OR (hieu luat)) ) OR ( tich nang quan binh hien soat )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dang hung van ((hieu suat) or (hieu luat)) ) or ( tich nang quan binh hien soat ))*.