Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
hien manh » hien hanh, tien manh, hieu manh
hanh hang » thanh hang, hanh han, hanh mang
hang hang » nang hang, cang thang, hung thang
dan than » dan chan, ban than, van than
van tuan » van quan, van ban, anh tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - ((hanh hang) OR (hang hang)) va nhung phuong ((dan than) OR (van tuan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - ((hanh hang) OR (hang hang)) va nhung phuong ((dan than) or (van tuan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - ((hanh hang) OR (hang hang)) va nhung phuong ((dan than) or (van tuan)) cau*.