Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
cua rung » cua trung, cua rang, cua truong
cua dang » cua cong, cua ban
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: ho ((hieu lang) or (chieu sang)) - canh tranh ((cua rung) or (cua dang)) cong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - canh tranh ((cua rung) OR (cua dang)) cong vang toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sang)) - canh tranh ((cua rung) or (cua dang)) cong vang toan cao*.