Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
ban thanh » ban hanh, ban hang
ho chieu » theo chieu, hoc thieu, doi chieu
vat cong » bat cong, sat cong, vat con
ban than » van thanh, ban hang, ban hanh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((hanh trinh) OR (thanh trung)) cua vat cong ((ban than) OR (ban thanh)) cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((hanh trinh) or (thanh trung)) cua vat cong ((ban than) OR (ban thanh)) cap~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((hanh trinh) or (thanh trung)) cua vat cong ((ban than) OR (ban thanh)) cap*.