Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
phuong cong » phuong dong, phong cong, phuong hoang
thieu sang » chieu sang, thieu quang, hieu lang
phung cong » nhung cong, phong cong, nhung chong
tran hong » tran hoang, tran trong, tranh hang
lang tuan » lang xuan, quang tuan, hoang tuan
hong va » thong va, phong va, hong van
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)) - tran hong va ((phuong cong) OR (phung cong)) lang tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - tran hong va ((phuong cong) OR (phung cong)) lang tuan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu khang)) - tran hong va ((phuong cong) OR (phung cong)) lang tuan cu".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu khang)) - tran hong va ((phuong cong) OR (phung cong)) lang tuan cu*.