Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
chiet tach » chieu sach
canh trinh » canh tranh, hanh trinh, anh trinh
nhung cong » dung cong, thong cong, hang cong
canh tinh » hanh tinh, manh tinh, canh tranh
vat nhung » va nhung, vap nhung, vai nhung
cong san » cong tac
san chan » san chang, dan chan, san chay
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 xanh) or (chiet tach)) - ((canh trinh) OR (canh tinh)) vat nhung cong san chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chiet tach)) - ((canh trinh) OR (canh tinh)) vat nhung cong san chan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chiet tach)) - ((canh trinh) OR (canh tinh)) vat nhung cong san chan tu".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chiet tach)) - ((canh trinh) OR (canh tinh)) vat nhung cong san chan tu*.