Perhaps you should try some spelling variations:
quan thanh » ban thanh, van thanh
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh cham » thanh pham, hanh cham, thanh cha
hieu lang » hieu quang, nhieu tang, hieu van
hanh mang » nhanh mang, hanh trang, nhanh lang
dung quan » dung quang, dung luan, luong quan
mang dac » mang dat, mang dau, mang sach
dac ung » dac hung, cac ung, dap ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) or (hieu lang)) - hanh mang dac ung dung quan thanh cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu lang)) - hanh mang dac ung dung quan thanh cham.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (hieu lang)) - hanh mang dac ung dung quan thanh cham*.