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
dang cong » dung cong
tan khang » tao khang, tinh khang, toan thang
van khang » van khanh, van thanh, van quang

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 ((dang cong) or (cong dong)) ((tan khang) OR (van khang)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - hanh tranh cua ((dang cong) OR (cong dong)) ((tan khang) OR (van khang)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - hanh tranh cua ((dang cong) or (cong dong)) ((tan khang) OR (van khang)) cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - hanh tranh cua ((dang cong) or (cong dong)) ((tan khang) OR (van khang)) cau*.