Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than ma » than man, than va, khan ma

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - hanh tranh ((cua nhung) OR (va nhung)) cong tan than ma~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - hanh tranh ((cua nhung) OR (va nhung)) cong tan than ma*.