Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, hien hanh
hanh manh » hanh mang, lanh manh, hoang manh
dung cong » dung trong
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (dieu hanh)) - hanh manh cua dung cong ((dan than) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - hanh manh cua dung cong ((dan than) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (dieu hanh)) - hanh manh cua dung cong ((dan than) or (dan chan)) cau*.