Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
hanh hanh » hanh han, xanh hanh, nhanh thanh
cong danh » cuong danh, cong thanh, cong khanh
cong dan » cong san, cong tan, huong dan
phap cau » phan cau, pha cau, phap ca
hanh va » hang va, hanh vi

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 nhanh)) - hanh hanh va nhung ((cong danh) OR (cong dan)) phap cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh hanh va nhung ((cong danh) OR (cong dan)) phap cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - hanh hanh va nhung ((cong danh) OR (cong dan)) phap cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - hanh hanh va nhung ((cong danh) OR (cong dan)) phap cau*.