Perhaps you should try some spelling variations:
phuong cong » phong cong, phung cong, phuong hoang
phuong dong » phuong dung, phuong hoang, chuong duong
chieu sach » chinh sach, chieu sang, chieu xanh
nhanh mang » nhanh lang, hanh mang, nhanh quang
mang doan » hang doanh, quang doan, trang doan
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 sach) or (chiet tach)) - nhanh mang doan ((phuong cong) OR (phuong dong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - nhanh mang doan ((phuong cong) OR (phuong dong)) tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chiet tach)) - nhanh mang doan ((phuong cong) OR (phuong dong)) tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - nhanh mang doan ((phuong cong) OR (phuong dong)) tinh toan cau*.