Perhaps you should try some spelling variations:
nhung trong » nhung tuong, thuong trong, nguong trong
chieu sang » chieu sach, chieu xanh, nhieu tang
hung trong » huong trong, dung trong, cung trong
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
van thanh » ban thanh, van tuan
thanh tay » thanh tai, thanh toan, thanh thuy

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung trong) OR (hung trong)) van thanh tay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - canh tranh cua ((nhung trong) OR (hung trong)) van thanh tay.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung trong) OR (hung trong)) van thanh tay".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung trong) OR (hung trong)) van thanh tay*.