Perhaps you should try some spelling variations:
phuong long » phuong luong, phuong dong, phuong hoang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
dang doan » dang don, dang toan, dung doanh
long tinh » cong tinh, trong tinh, luong tin
dang dan » dang dang, dang van, dung dan
toan cau » toan cao, toan ban, toan tap

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)) - anh ((dang doan) OR (dang dan)) phuong long tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - anh ((dang doan) OR (dang dan)) phuong long tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - anh ((dang doan) OR (dang dan)) phuong long tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - anh ((dang doan) OR (dang dan)) phuong long tinh toan cau*.