Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
anh nang » ganh nang, anh bang, anh dang
cong san » cong tac
toan cao » toan tap
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: ho chieu sang - ((canh tranh) or (anh nang)) va nhung cong san ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((canh tranh) OR (anh nang)) va nhung cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((canh tranh) or (anh nang)) va nhung cong san ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((canh tranh) or (anh nang)) va nhung cong san ((toan cao) OR (toan ban))*.