Perhaps you should try some spelling variations:
thuong quang » thong quang, truong quang, phuong quang
tinh thuong » trinh thuong, tinh huong, dinh thuong
hieu luat » hieu qua
van hieu » cao hieu
quang vi » quan vi, quang si, quang va
vi dien » vi mien, vi dieu, bi dien
hoa » khoa

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