Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
san chang » ban hang, dan chan, van khang
tranh va » tranh van, trang va, trinh va
cong san » cong tac
chang tu » chung tu, chang xu, hang tu

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 xanh) or (hieu manh))) or (chieu sach)) - canh tranh va nhung cong san chang tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((chieu xanh) OR (hieu manh))) OR (chieu sach)) - canh tranh va nhung cong san chang tu.
• Adding a wildcard symbol may retrieve word variants: doi ((((chieu xanh) or (hieu manh))) or (chieu sach)) - canh tranh va nhung cong san chang tu*.