Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
nhung huong » nhung phuong, nhung tuong, nhung cong
hoc xanh » hoc anh, hoc danh, hoc nganh
hoc hanh » hoc nhanh, hoc thanh, hoc anh
hanh nha » thanh nha, hanh nhan, hang nha
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
nha cua » nhat cua, nhan cua, nghia cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: khoa ((hoc xanh) OR (hoc hanh)) - hanh nha cua ((nhung huong) OR (dung phuong)) dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "khoa ((hoc xanh) OR (hoc hanh)) - hanh nha cua ((nhung huong) OR (dung phuong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: khoa ((hoc xanh) OR (hoc hanh)) - hanh nha cua ((nhung huong) OR (dung phuong)) dan toan cao*.