Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
dap luong » dai luong, do luong, van luong
chi sang » chi lang, chi chang, khai sang
da luong » dai luong, do luong, du luong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi sang) OR (chieu sang)) - thanh tung ((dap luong) or (da luong)) cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi sang) OR (chieu sang)) - thanh tung ((dap luong) OR (da luong)) cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi sang) OR (chieu sang)) - thanh tung ((dap luong) or (da luong)) cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chi sang) OR (chieu sang)) - thanh tung ((dap luong) or (da luong)) cong san toan cau*.