Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
luat cong » thuat cong, luat chung, cua cong
cong tang » cong thang, cong tan, cong lang
tang quan » tang luan, nang quan, tong quan
hoc hieu » hoc thieu, hoc hien, doc hieu
quan ha » quan he

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: hoc hieu manh - hanh trinh ((luat cong) OR (thu cong)) cong tang quan ha~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh ((luat cong) or (thu cong)) cong tang quan ha*.