Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
theo chieu » theo tieu, ho chieu, theo chu
tranh cua » doanh cua, manh cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
thi hien » thi lien, thi huyen, thi hue
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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) or (thi hien)) xanh - hanh tranh cua ((hang cong) or (dang cong)) san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (thi hien)) xanh - hanh tranh cua ((hang cong) OR (dang cong)) san toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (thi hien)) xanh - hanh tranh cua ((hang cong) or (dang cong)) san toan cau*.