Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
truong dong » truong dang, tuong dong, thuong dong
thieu sang » chieu sang, thieu khang, hieu lang
chinh luat » chinh luan, hinh luat, trinh luat
trong dong » trong cong, trong nong, trong dang
dao van » do van, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) OR (thieu quang)) - hanh chinh luat ((truong dong) or (trong dong)) dao van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - hanh chinh luat ((truong dong) OR (trong dong)) dao van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu quang)) - hanh chinh luat ((truong dong) or (trong dong)) dao van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu quang)) - hanh chinh luat ((truong dong) or (trong dong)) dao van ban*.