Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
cong dang » cong dong, cong dan, cong dung
doi hieu » doi chieu, doc hieu, doi hien
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh dung va nhung cong dang ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - thanh dung va nhung cong dang ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh dung va nhung cong dang ((toan cau) OR (toan tap))*.