Perhaps you should try some spelling variations:
phuong dong » phuong dung, phuong hoang, chuong duong
luan phuong » lan phuong, quang phuong, doan phuong
hieu quang » thieu quang, hieu quan, hieu qua
hieu lang » chieu sang, nhieu tang, hieu van
hanh dung » thanh dung, anh dung, hanh dong
vat thanh » dat thanh, gat thanh, tat thanh
thanh cha » thanh ha, thanh nha, thanh phan
dong vat » dong va, dong von, dong ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (hieu quang)) - hanh dung luan phuong dong vat thanh cha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - hanh dung luan phuong dong vat thanh cha*.