Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
hanh tung » thanh tung, manh tung, hanh dung
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu manh - ((((hanh tang) or (hanh tung))) or (nhanh quang)) va nhung cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((((hanh tang) OR (hanh tung))) OR (nhanh quang)) va nhung cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((((hanh tang) or (hanh tung))) or (nhanh quang)) va nhung cong dan than tap*.