Perhaps you should try some spelling variations:
huong quang » phuong quang, thuong quang, luong quang
tinh huong » dinh huong, tinh quang, anh huong
hieu luat » hieu qua
dien soat » dien hoat, dien hoa, kiem soat
van hieu » cao hieu
quang vi » quan vi, quang si, quang va
vi dien » vi mien, vi dieu, bi dien
luan » quan, lan

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 van hieu luat ) or ( tinh huong quang vi dien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung luan van hieu luat ) OR ( tinh huong quang vi dien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung luan van hieu luat ) or ( tinh huong quang vi dien soat ))*.