Perhaps you should try some spelling variations:
nhung chong » nhung cong, nhung phong, nhung phuong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
chong xay » thong xay, cong xay, chong chay
tranh va » tranh van, trang va, trinh va
xay toan » xuan toan, bai toan, tap toan
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) OR (hien hanh)) - canh tranh va nhung chong xay toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - canh tranh va nhung chong xay toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - canh tranh va nhung chong xay toan ban*.