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
tranh cua » doanh cua, manh cua
cong cong » trong cong, dung cong, dang cong
tan khang » van khang, tao khang, tinh khang
khang cau » hang cau, khang cu, khang chan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sang - hanh tranh cua ((cong cong) or (cong dong)) tan khang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - hanh tranh cua ((cong cong) OR (cong dong)) tan khang cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - hanh tranh cua ((cong cong) or (cong dong)) tan khang cau*.