Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tac toan » tam toan, hach toan, tich toan
tap toan » tap quan, bai toan
tap doan » tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - hanh tranh cua nhung cong ((tac toan) or (((tap toan) OR (tap doan)))) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh tranh cua nhung cong ((tac toan) OR (((tap toan) OR (tap doan)))) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh tranh cua nhung cong ((tac toan) or (((tap toan) OR (tap doan)))) tap".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh tranh cua nhung cong ((tac toan) or (((tap toan) OR (tap doan)))) tap*.