Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu
tang cua » mang cua, hang cua, tang luan
cong san » cong tac
chan cau » can cau, chinh cau, nhanh cau
phan cau » phan dau, phan cac, phan tu

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) or (hoc hien)) manh - hanh tang cua nhung cong san ((chan cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) manh - hanh tang cua nhung cong san ((chan cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc hien)) manh - hanh tang cua nhung cong san ((chan cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) manh - hanh tang cua nhung cong san ((chan cau) OR (phan cau))*.