Perhaps you should try some spelling variations:
phuong tuong » phong tuong, phuong duong, phuong luong
cua phuong » cuu phuong, cuc phuong, luan phuong
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh hinh » hanh chinh, hanh tinh, hanh dinh
tuong dan » huong dan, tung dan, xuong dan
hinh cua » chinh cua, sinh cua, tinh cua
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 - hanh hinh cua phuong tuong dan toan cao~.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh hinh cua phuong tuong dan toan cao*.