Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
nang hang » nang sang, hang hang, lang thang
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
toan tai » doanh tai, toan ban, toan cao
toan tap » toan 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 - ((nang hang) or (cang thang)) cua dang cong tan ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((nang hang) OR (cang thang)) cua dang cong tan ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((nang hang) or (cang thang)) cua dang cong tan ((toan tai) or (toan tap))*.