Perhaps you should try some spelling variations:
thanh trung » thanh tung
dang phuong » bang phuong, dung phuong, dan phuong
phuong tinh » phuong trinh, phuong binh, khuong tinh
trung tuan » trung thanh, trung tam, tran tuan
hieu sang » chieu sang, hieu quang, nhieu tang
hieu lang » chieu sang, hieu quang, nhieu tang
tuan dang » tran dang, tuan bang, tuan dung
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: doc ((hieu sang) OR (hieu lang)) - thanh trung tuan dang phuong tinh ((toan tap) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sang) OR (hieu lang)) - thanh trung tuan dang phuong tinh ((toan tap) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sang) OR (hieu lang)) - thanh trung tuan dang phuong tinh ((toan tap) OR (van ban))*.