Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
thieu xanh » chieu xanh, thien anh, thien danh
trinh quan » tinh quang, trinh han
phuong van » phung van, phong van, phuong lan
hieu manh » chieu xanh, hieu nganh, dieu hanh
van than » van thanh, van thang, van tuan
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: hoc ((thieu xanh) OR (hieu manh)) - hanh ((trinh luat) or (trinh quan)) dung phuong van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - hanh ((trinh luat) OR (trinh quan)) dung phuong van than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - hanh ((trinh luat) or (trinh quan)) dung phuong van than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - hanh ((trinh luat) or (trinh quan)) dung phuong van than cau*.