Perhaps you should try some spelling variations:
phuong huong » phuong duong, phuong luong, thuong phuong
hien manh » hien hanh, tien manh, hien nhanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
huong cua » dung cua
cong cua » cong cu, dong cua, thong cua
dan than » dan chan, ban than, van 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: hoc ((hien manh) or (hieu manh)) - thanh ((cong cua) OR (huong cua)) phuong huong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hieu manh)) - thanh ((cong cua) OR (huong cua)) phuong huong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) or (hieu manh)) - thanh ((cong cua) OR (huong cua)) phuong huong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) or (hieu manh)) - thanh ((cong cua) OR (huong cua)) phuong huong dan than cau*.