Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh thang » nhanh thang, thanh thanh, thanh hang
thieu sang » chieu sang, thieu khang, hieu lang
thang va » hang va, trang va, thong va
va thong » va thuong, va phuong, he thong
cong van » cong vang, song van, cong tan
cong san » cong tac
tuan cau » toan cau, quan cau, tuan cu

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)) - thanh thang va thong ((cong van) OR (cong san)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - thanh thang va thong ((cong van) OR (cong san)) tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu quang)) - thanh thang va thong ((cong van) OR (cong san)) tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu quang)) - thanh thang va thong ((cong van) OR (cong san)) tuan cau*.