Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong tinh » phuong trinh, phuong binh, khuong tinh
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, nhieu tang
thanh tung » thanh cong
hieu lang » hieu quang, nhieu tang, hieu van
cua nhung » va nhung
tung cua » trung cua, tuong cua, dung cua
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (((chieu sang) OR (hieu lang)))) - thanh tung cua nhung phuong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (((chieu sang) OR (hieu lang)))) - thanh tung cua nhung phuong tinh toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (((chieu sang) OR (hieu lang)))) - thanh tung cua nhung phuong tinh toan ban*".