Perhaps you should try some spelling variations:
phuong thao » phuong phap, phuong thuc
phuong danh » phuong anh, phuong dinh, phuong hanh
nhung huong » nhung phuong, nhung tuong, nhung cong
phuong dao » phuong doan, truong dao, duong dao
hien xanh » hien hanh, hien nhanh, chieu xanh
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 xanh - thanh ((((phuong dao) OR (phuong thao))) or (phuong danh)) nhung huong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh ((((phuong dao) OR (phuong thao))) OR (phuong danh)) nhung huong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh ((((phuong dao) OR (phuong thao))) or (phuong danh)) nhung huong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((((phuong dao) OR (phuong thao))) or (phuong danh)) nhung huong dan toan tap*.