Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
trung quan » truong quan, trung tuan, truong quang
trong quan » thong quan, tong quan, thong quang
trong dung » thong dung, trung dung, trong rung
hieu lang » hieu quang, nhieu tang, hieu van
dung toan » dung doanh, dung thang, dung thanh
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: theo ((chieu sang) OR (hieu lang)) - hanh ((trung quan) or (trong quan)) dung trong dung toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - hanh ((trung quan) OR (trong quan)) dung trong dung toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (hieu lang)) - hanh ((trung quan) or (trong quan)) dung trong dung toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (hieu lang)) - hanh ((trung quan) or (trong quan)) dung trong dung toan cao*.