Perhaps you should try some spelling variations:
trinh thuat » trinh thuc, trinh chat, trinh thuy
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 than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
luat » luan, xuat

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