Perhaps you should try some spelling variations:
luong cong » dung cong, trong cong, cong cong
hieu lang » chieu sang, hieu quang, nhieu tang
nha hieu » nha dieu, nghe hieu, phan hieu
nang duc » nang doc, nang du, dang duc
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan dau » phan dau, han dau, chan doan

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

• Performing a fuzzy search may retrieve terms with similar spellings: nha hieu lang - anh ((nang duc) OR (nang luc)) luong cong dan chan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nha hieu lang - anh ((nang duc) OR (nang luc)) luong cong dan chan dau*".