Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hach toan » thanh toan, manh toan
cach ung » cach dung, cac ung, cach chung
ung cong » dung cong, luong cong, duong cong
tac toan » tap toan, tam toan, tich toan
phong » thong

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 xanh) OR (chieu sach)) - khanh phong cach ung cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - khanh phong cach ung cong ((tac toan) OR (hach toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) OR (chieu sach)) - khanh phong cach ung cong ((tac toan) or (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) OR (chieu sach)) - khanh phong cach ung cong ((tac toan) or (hach toan)) cau*.