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 » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hieu manh) or (chieu sang))) or (chieu sach)) - canh tranh cua nhung cong ban than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (chieu sang))) OR (chieu sach)) - canh tranh cua nhung cong ban than ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) or (chieu sang))) or (chieu sach)) - canh tranh cua nhung cong ban than ban*.