Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh trinh » canh tranh, hanh chinh
cong luong » cong thuong, nang luong, cong dong
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
than cau » toan cau, phan cau, than cap
toan cao » toan ban, toan tap
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 sach)) - hanh trinh va dung cong luong ((than cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - hanh trinh va dung cong luong ((than cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - hanh trinh va dung cong luong ((than cau) or (toan cao))*.