Perhaps you should try some spelling variations:
chieu quang » hieu quang, thieu quang, hieu quan
thanh tinh » thanh binh, nhanh tinh, than kinh
nhung cong » dung cong, thong cong, hang cong
chu quang » chat quang, vu quang
cua nhung » va nhung
cong manh » cong danh, duong manh, cong thanh
tinh cua » trinh cua, sinh cua, tinh chat
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu quang) or (chu quang)) - thanh tinh cua nhung cong manh ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu quang) OR (chu quang)) - thanh tinh cua nhung cong manh ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu quang) or (chu quang)) - thanh tinh cua nhung cong manh ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu quang) or (chu quang)) - thanh tinh cua nhung cong manh ((toan cau) OR (toan cao))*.