Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
quan quang » qua quang, quan quan, quat quang
trien hoat » tien hoa
dinh quan » dinh quang, dinh xuan, dinh duan
quang va » quang van, quan va, quang ma
va trien » va truyen, va thiet, va tuyen
quan lan » quan luan, quan lang, quan van
ban soan » bien soan, ban doanh, nang soan
lan van » luan van, lang van, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh quan quang va trien hoat ) or ( dinh quan lan van ban soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh quan quang va trien hoat ) OR ( dinh quan lan van ban soan )).
• Adding a wildcard symbol may retrieve word variants: (( trinh quan quang va trien hoat ) or ( dinh quan lan van ban soan ))*.