Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
thanh hang » thanh hoang, thanh thang, tranh hang
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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 sach) or (chieu xanh)) - thanh hang va ((nhung cong) OR (thong cong)) san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu xanh)) - thanh hang va ((nhung cong) OR (thong cong)) san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu xanh)) - thanh hang va ((nhung cong) OR (thong cong)) san toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu xanh)) - thanh hang va ((nhung cong) OR (thong cong)) san toan cao*.