Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
trinh thanh » tinh thanh, trinh han, trinh toan
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
hieu manh » chieu xanh, hieu nganh, hien hanh
dung cong » dung trong
thanh cau » thanh chau, thanh mau, nhanh cau

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