Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hanh trinh » canh tranh, hanh chinh
trinh suat » trinh luat, trinh sat, trinh quan
suat luong » suat huong, chat luong, suat thong
luong cong » dung cong, trong cong, cong cong
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chinh sach)) - hanh trinh suat luong cong tinh toan ban~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chinh sach)) - hanh trinh suat luong cong tinh toan ban*.