Perhaps you should try some spelling variations:
dung lang » dung dang, dung nang, dung land
hieu luat » hieu qua
trinh san » trinh han, trinh quan, trinh toan
hien soat » thien hoat, kiem soat, bien soan
lang van » dang van, tang van, hoang van
van hieu » cao hieu
san quan » van quan, ban quan, dan quan
quan van » luan van, quan va, quan luan
van hien » van tien
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 lang van hieu luat ) or ( trinh san quan van hien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung lang van hieu luat ) OR ( trinh san quan van hien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung lang van hieu luat ) or ( trinh san quan van hien soat ))*.