Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
cong dap » cong dan, cong lap, cong da
dap dung » ap dung, dan dung, dap ung
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 ((hieu lang) or (chieu sang)) - thanh cong dap dung cong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sang)) - thanh cong dap dung cong vang toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sang)) - thanh cong dap dung cong vang toan cau*.