Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
danh trung » dang trung, dinh trung, manh trung
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
dap dung » ap dung, dan dung, dap ung
cong san » cong tac
toan ban » van ban

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 sang - ((danh trung) or (canh tranh)) dap dung cong san ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((danh trung) OR (canh tranh)) dap dung cong san ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((danh trung) or (canh tranh)) dap dung cong san ((toan tap) or (toan ban))*.