Perhaps you should try some spelling variations:
trong quang » truong quang, thong quang, trong quan
dinh trong » sinh trong, chinh trong, dinh thuong
trong luan » truong luan, tong luan, trong quan
hieu luat » hieu qua
quang va » quang van, quan va, quang ma
va hieu » van hieu, va dieu, va hien
bien so » bien doi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( dinh trong quang va hieu luat ) or ( dinh trong luan van ((bien soan) OR (bien so)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( dinh trong quang va hieu luat ) OR ( dinh trong luan van ((bien soan) OR (bien so)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( dinh trong quang va hieu luat ) or ( dinh trong luan van ((bien soan) OR (bien so)) ))".
• Adding a wildcard symbol may retrieve word variants: (( dinh trong quang va hieu luat ) or ( dinh trong luan van ((bien soan) OR (bien so)) ))*.