Perhaps you should try some spelling variations:
trinh dang » trinh dung, trinh dan, trinh bang
hieu luat » hieu qua
dang cong » dung cong
cong xuan » dong xuan, cong luan, cong tuan
xuan kien » xuan dien, xuan kieu, xuan vien
kien soat » kiem soat, bien soan, kien hoa
luan cao » juan cao, luan bao, quang cao
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung luan cao hieu luat ) or ( trinh dang cong xuan kien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung luan cao hieu luat ) OR ( trinh dang cong xuan kien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung luan cao hieu luat ) or ( trinh dang cong xuan kien soat ))*.