Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tac » cong ty
doan tap » toan tap, doan cap, doan tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thanh trung cua nhung cong tac ((doan tap) OR (doanh tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sang - thanh trung cua nhung cong tac ((doan tap) OR (doanh tai))".
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh trung cua nhung cong tac ((doan tap) OR (doanh tai))*.