Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh suat » trinh luat, trinh sat, trinh quan
suat luong » suat huong, chat luong, suat thong
duong manh » duong van
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong dan » cong san, cong tan, huong dan
toan ban » van ban

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: theo chu sach - hanh trinh suat luong ((cong dan) OR (duong manh)) toan ban~.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh trinh suat luong ((cong dan) or (duong manh)) toan ban*.