Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
hanh trang » thanh trung, canh tranh, hanh trinh
hanh mang » nhanh mang, nhanh lang, thanh hang
cong cong » cong dong, trong cong, dung cong
ban thanh » ban hanh, ban hang
thanh cao » thanh ca, thanh cac, thanh thao
cong ban » cong bang, cong san, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu quang)) - ((hanh mang) OR (hanh trang)) cua cong cong ban thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu quang)) - ((hanh mang) OR (hanh trang)) cua cong cong ban thanh cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu quang)) - ((hanh mang) OR (hanh trang)) cua cong cong ban thanh cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu quang)) - ((hanh mang) OR (hanh trang)) cua cong cong ban thanh cao*.