Perhaps you should try some spelling variations:
phuong hinh » phuong binh, phuong dinh, phuong hanh
phuong linh » phuong binh, phuong trinh, cuong linh
chieu sang » chieu sach, chieu xanh, hieu lang
hieu sang » hieu lang, hieu quang, nhieu tang
va truong » van truong, xa truong, va thuong
tranh va » tranh van, trang va, trinh va
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: doc ((hieu sang) or (chieu sang)) - canh tranh va truong ((phuong hinh) OR (phuong linh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sang) OR (chieu sang)) - canh tranh va truong ((phuong hinh) OR (phuong linh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sang) or (chieu sang)) - canh tranh va truong ((phuong hinh) OR (phuong linh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sang) or (chieu sang)) - canh tranh va truong ((phuong hinh) OR (phuong linh)) toan ban*.