Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhuong cong » nhung cong, luong cong, thong cong
chieu sang » chieu sach, chieu xanh, nhieu tang
trung phai » trung phan, trung hai, trung phat
duong cong » dung cong, luong cong, duong trong
hieu lang » hieu quang, nhieu tang, hieu van
tac nhan » tao nhan, cac nhan, dac nhan
nhan cap » khan cap, than cap, nhan cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) OR (hieu lang)) - thanh trung phai ((nhuong cong) or (duong cong)) tac nhan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung phai ((nhuong cong) OR (duong cong)) tac nhan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (hieu lang)) - thanh trung phai ((nhuong cong) or (duong cong)) tac nhan cap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (hieu lang)) - thanh trung phai ((nhuong cong) or (duong cong)) tac nhan cap*.