Perhaps you should try some spelling variations:
hien thanh » thien thanh, hien hanh, tien thanh
canh trinh » canh tranh, hanh trinh, canh tinh
dan khoan » dan khoa, dai khoang, toan khoan
khoan cam » khoa cam, khoan va, phan cam
trinh ha » trinh han, trinh hoa, trinh nha
ha thanh » va thanh, pham thanh, phan thanh
cong dan » cong san, cong tan, huong dan

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 thanh - canh trinh ha thanh cong dan khoan cam~.
• Adding a wildcard symbol may retrieve word variants: hoc hien thanh - canh trinh ha thanh cong dan khoan cam*.