Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh chua » trinh chuan, trinh cua, trinh chu
hieu manh » chieu xanh, hieu nganh, dieu hanh
dong cong » duong cong, cong cong, tong cong
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
dan hanh » dang hanh, dan khanh, dan thanh
hanh cac » hang cac, hanh cat, nhanh cay

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

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