Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
dan phan » doan phan, dan chan, van phan

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 - hanh trinh cua ((nhung cong) or (dung cong)) dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trinh cua ((nhung cong) OR (dung cong)) dan phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh cua ((nhung cong) or (dung cong)) dan phan tu*.