Perhaps you should try some spelling variations:
nhu phuong » thu phuong, nhung phuong, thi phuong
phuong dan » phuong danh, phuong doan, huong dan
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua
manh cua » doanh cua, ban cua
toan cao » toan tap
toan ban » van 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 - canh ((tranh cua) or (manh cua)) nhu phuong dan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh ((tranh cua) OR (manh cua)) nhu phuong dan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh ((tranh cua) or (manh cua)) nhu phuong dan ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh ((tranh cua) or (manh cua)) nhu phuong dan ((toan cao) OR (toan ban))*.