Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
hoi hieu » hoi phieu, hoi tieu, moi hieu
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu quang - nhanh tinh cua nhung cong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu quang - nhanh tinh cua nhung cong dan ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu quang - nhanh tinh cua nhung cong dan ((toan cau) or (toan cao))*.