Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thanh pham » thanh phan, thanh pho, thanh hai
cua khung » cua nhung, cua chung, cua khong
hoang ban » hoang van, hang ban, hoang bao
ban thanh » ban hanh, ban hang

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 (chieu sach)) - canh tranh ((cua khung) or (va nhung)) hoang ban thanh pham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu sach)) - canh tranh ((cua khung) OR (va nhung)) hoang ban thanh pham.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (chieu sach)) - canh tranh ((cua khung) or (va nhung)) hoang ban thanh pham".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (chieu sach)) - canh tranh ((cua khung) or (va nhung)) hoang ban thanh pham*.