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
kien soat » kiem soat, kien hoa, dien hoat
bien soan » bien so
luan bao » luat bao, luan ban, xuan bao
bao hieu » bao nhieu, cao hieu, bao hiem
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 bao hieu luat ) or ( trinh dang cong xuan ((kien soat) OR (bien soan)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung luan bao hieu luat ) OR ( trinh dang cong xuan ((kien soat) OR (bien soan)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tin dung luan bao hieu luat ) or ( trinh dang cong xuan ((kien soat) OR (bien soan)) ))".
• Adding a wildcard symbol may retrieve word variants: (( tin dung luan bao hieu luat ) or ( trinh dang cong xuan ((kien soat) OR (bien soan)) ))*.