Perhaps you should try some spelling variations:
duong tinh » duong minh, duong sinh, dong tinh
dong duong » tuong duong, cuong duong, dong thong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dung » thanh dung, anh dung, hanh dong
luan dong » luan cong, quan dong, luan nong
nho hieu » nha hieu, nho sieu, nhu hieu
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

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