Perhaps you should try some spelling variations:
trinh thuat » trinh thiet, trinh thuc, trinh chat
dung phuong » dung thuong, bang phuong, dung chung
theo chieu » theo tieu, theo chu, thi chieu
phuong lan » phuong la, thuong lan, phuong linh
ho chieu » hoc thieu, doi chieu, mot chieu
lan than » ban than, van than, dan than
than cau » toan cau, phan cau, 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: ((ho chieu) or (theo chieu)) xanh - hanh ((trinh thuat) OR (trinh luat)) dung phuong lan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) xanh - hanh ((trinh thuat) OR (trinh luat)) dung phuong lan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) xanh - hanh ((trinh thuat) OR (trinh luat)) dung phuong lan than cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) xanh - hanh ((trinh thuat) OR (trinh luat)) dung phuong lan than cau*.