Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
tan chan » dan chan, ban chan, can chan
chan tu » phan tu, han tu, chon tu

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 sang)) - canh tranh va ((nhung cong) or (dung cong)) tan chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - canh tranh va ((nhung cong) OR (dung cong)) tan chan tu.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - canh tranh va ((nhung cong) or (dung cong)) tan chan tu*.