Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
trung phat » truong phat, trong phat, trung phan
phat trong » pham trong, chat trong, nhat trong
hieu lang » hieu quang, nhieu tang, hieu van
ban thanh » ban hanh, ban hang
ban nhan » ban than, van nhan, benh nhan

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

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