Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hanh mang » nhanh mang, hanh trang, nhanh lang
cong tong » cong trong, cong thong, cong dong
tong manh » tong minh, tung manh, tong panh
manh toan » thanh toan, anh tuan, tinh toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - ((hanh mang) OR (canh tranh)) cua cong tong manh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (hieu lang)) - ((hanh mang) or (canh tranh)) cua cong tong manh toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (hieu lang)) - ((hanh mang) or (canh tranh)) cua cong tong manh toan cao*.