Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu qua, diep quang
hanh trinh » canh tranh, hanh chinh
trinh thuc » trinh tu, trinh thi
hieu quan » hieu qua, lieu quan, thien quan
thuc nang » chuc nang, thuc trang, thich nang
nang cong » nang song, dang cong, bang cong
dan thanh » dang thanh, danh thanh, ban thanh
thanh cac » hanh cac, thanh bac, thanh ca
cong dan » cong san, cong tan, huong dan

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: ho ((chieu sach) OR (((hieu quang) OR (hieu quan)))) - hanh trinh thuc nang cong dan thanh cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (((hieu quang) OR (hieu quan)))) - hanh trinh thuc nang cong dan thanh cac~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (((hieu quang) OR (hieu quan)))) - hanh trinh thuc nang cong dan thanh cac*.