Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hung cong » hung cuong, phung cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
toan ban » van ban

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 trinh thuat ((hung cong) or (nhung cong)) tan ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh trinh thuat ((hung cong) OR (nhung cong)) tan ((toan ban) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh trinh thuat ((hung cong) or (nhung cong)) tan ((toan ban) or (toan tap))*.