Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
nho hieu » nha hieu, nho sieu, nhu hieu
cong dan » cong san, cong tan, huong dan
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - ((hanh tang) OR (hanh mang)) va nhung cong dan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho hieu lang - ((hanh tang) OR (hanh mang)) va nhung cong dan ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - ((hanh tang) OR (hanh mang)) va nhung cong dan ((toan cau) or (toan ban))*.