Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong dinh » phuong linh, phuong trinh, phuong anh
phuong binh » phuong trinh, phuong anh, chuong trinh
chieu sang » chieu sach, chieu xanh, nhieu tang
quoc trong » quoc truong, nuoc trong, quoc trung
hieu lang » hieu quang, nhieu tang, hieu van
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu lang)) - thanh trung quoc trong ((phuong dinh) OR (phuong binh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung quoc trong ((phuong dinh) OR (phuong binh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh trung quoc trong ((phuong dinh) OR (phuong binh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung quoc trong ((phuong dinh) OR (phuong binh)) toan tap*.