Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu quang » thieu quang, hieu quan, hieu qua
hanh trong » hanh trang, anh trong, hinh trong
dung cong » dung trong
trong ca » trong cac, trong nha
dan chan » dan gian, dan ca
van chat » cao chat
ca dung » cao dung, cap dung, cu dung

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 xanh) or (hieu quang)) - hanh trong ca dung cong ((dan chan) OR (van chat)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (hieu quang)) - hanh trong ca dung cong ((dan chan) OR (van chat)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (hieu quang)) - hanh trong ca dung cong ((dan chan) OR (van chat)) cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (hieu quang)) - hanh trong ca dung cong ((dan chan) OR (van chat)) cau*.