Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
phuong cong » phuong dong, phong cong, phuong hoang
thieu sang » chieu sang, thieu khang, hieu lang
danh thang » danh thanh, dinh thang, nhanh thang
phung cong » nhung cong, phong cong, nhung chong
thang va » hang va, trang va, thong va
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap

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