Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
cua nhung » va nhung
hach toan » thanh toan, manh toan
canh ban » can ban, canh dan, canh van
tac toan » tap toan, tam toan, tich toan
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - canh ban cua nhung cong ((tac toan) OR (hach toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - canh ban cua nhung cong ((tac toan) OR (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - canh ban cua nhung cong ((tac toan) OR (hach toan)) cau*.