Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
thanh thong » thanh thuong, thanh hong, thanh thang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tuong tac » cong tac, luong tai, tuong lai
thong va » trong va, thong cua, truong va
tac dan » tac danh, cac dan, tac da

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) OR (hieu lang)) - thanh thong va nhung tuong tac dan ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu sang) OR (hieu lang)) - thanh thong va nhung tuong tac dan ca".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) OR (hieu lang)) - thanh thong va nhung tuong tac dan ca*.