Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tieu xanh » tieu danh, chieu xanh, dieu hanh
thuc hang » thuc hanh, thu hang, thuy hang
phuc hang » phuc thanh, phuc khanh, phuc khong
cong san » cong tac
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 tieu xanh - hanh trinh ((thuc hang) OR (phuc hang)) cong san toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh trinh ((thuc hang) OR (phuc hang)) cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh trinh ((thuc hang) OR (phuc hang)) cong san toan cau*.