Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
dang cong » dung cong
toc hieu » toc thieu, doc hieu, hoc thieu
cach ban » cac ban, cach bao, cach ben
sach bao » sach dao, sach bai, sach bac
cua dang » cua cong, cua ban
van phan » van phong, van thanh, luan phan
sat phan » sat nhan, vat phan, xuat phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu manh - ((cach ban) or (sach bao)) cua dang cong ((van phan) or (sat phan)) lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - ((cach ban) OR (sach bao)) cua dang cong ((van phan) OR (sat phan)) lap.
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - ((cach ban) or (sach bao)) cua dang cong ((van phan) or (sat phan)) lap*.