Perhaps you should try some spelling variations:
thieu quang » thien quan, trien quang, hieu quan
hieu quang » hieu quan, hieu qua, diep quang
hanh hang » thanh hang, hang hang, hanh han
hang luan » tang luan, dung luan
luan dong » luan cong, quan dong, luan nong
dong cong » duong cong, dung cong, dang cong
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) OR (thieu quang)) - hanh hang luan dong cong san ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (thieu quang)) - hanh hang luan dong cong san ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) OR (thieu quang)) - hanh hang luan dong cong san ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) OR (thieu quang)) - hanh hang luan dong cong san ((toan cau) or (toan ban))*.