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, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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