Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
hanh trinh » canh tranh, hanh chinh
dung cong » dung trong
cong dung » cuong dung, cong dong, cong luong
nhanh cau » nhanh cay, thanh chau, nhanh ha
trinh va » trinh van, trinh vat, trinh ve
nhan cau » phan cau, nhan sau, nhin cau
va dung » van dung, va duong, vat dung

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 (chieu xanh)) - hanh trinh va dung cong dung ((nhan cau) OR (nhanh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu xanh)) - hanh trinh va dung cong dung ((nhan cau) OR (nhanh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (chieu xanh)) - hanh trinh va dung cong dung ((nhan cau) OR (nhanh cau))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu xanh)) - hanh trinh va dung cong dung ((nhan cau) OR (nhanh cau))*.