Perhaps you should try some spelling variations:
phuong duong » phuong dung, chuong duong, phuong dong
thieu sang » chieu sang, thieu khang, thieu quang
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
cua phuong » cuu phuong, cuc phuong, luan phuong
duong xanh » duong manh, duong van, duong sach
tung cua » trung cua, tuong cua, dung cua
tuan thu » toan thuc, van thu
tuan cu » tuan tu, quan cua, than cua

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