Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
tung cua » trung cua, tuong cua, dung cua
dan chan » dan gian, van chat

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 nganh) or (hieu lang)) - thanh tung cua thong cong ((dan chan) or (dan ca)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (hieu lang)) - thanh tung cua thong cong ((dan chan) OR (dan ca)) cac.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (hieu lang)) - thanh tung cua thong cong ((dan chan) or (dan ca)) cac*.