Perhaps you should try some spelling variations:
trong hang » trong dang, trong hung, trong tang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dong » anh dong, ha dong
hang luan » tang luan, dung luan
chu xanh » chu manh, chieu xanh, chua xang
dong ung » dong hung, dong cung, duong ung
luan cau » quan cau, lua cau, luat cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao ((chu xanh) or (hieu lang)) - hanh dong ung dung trong hang luan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chu xanh) OR (hieu lang)) - hanh dong ung dung trong hang luan cau.
• Adding a wildcard symbol may retrieve word variants: chao ((chu xanh) or (hieu lang)) - hanh dong ung dung trong hang luan cau*.