Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
cong danh » cuong danh, cong dan, cong thanh
sinh cua » manh cua, dinh cuu, sinh va
juan cao » quang cao, toan cao, quan cau
toan cau » 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: hoc ((thieu sang) OR (thieu quang)) - nhan sinh cua nhung cong danh ((juan cao) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - nhan sinh cua nhung cong danh ((juan cao) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu quang)) - nhan sinh cua nhung cong danh ((juan cao) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu quang)) - nhan sinh cua nhung cong danh ((juan cao) or (toan cau))*.