Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu khang » chieu khong
phuong cong » phuong dong, phong cong, phung cong
thieu sang » chieu sang, hieu lang, nhieu tang
tran thong » toan thong, tran hong, tran trong
va phuong » va thuong, cac phuong
cong lang » cong vang, cong luong, cong quang
lang tuan » lang xuan, quang tuan, hoang tuan
thong va » thong cua, truong va, thong qua
tuan cu » tuan tu, quan cua, tuan thu

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