Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
nhung huong » nhung phuong, nhung tuong, nhung cong
chieu xanh » chieu sach, chieu sang, chieu tinh
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
luat » luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - hanh ((trinh (luat OR xuat)) or (trinh thiet)) nhung huong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trinh (luat OR xuat)) OR (trinh thiet)) nhung huong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trinh (luat OR xuat)) or (trinh thiet)) nhung huong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trinh (luat OR xuat)) or (trinh thiet)) nhung huong dan toan cau*.