Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, hieu lang
trung cua » truong cua, trung tuan, trung cap
hang nong » thang long, han tong
cua hang » cua dang, cua nhung, cua cong
menh van » dinh van, nen van, minh va
benh va » benh ve, benh dai, benh tai

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