Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh manh » hanh mang, lanh manh, hoang manh
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
manh cua » doanh cua, ban cua
tac nhan » tao nhan, cac nhan, dac nhan
nhan cap » khan cap, than cap, nhan cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chiet tach) or (chinh sach)) - hanh manh cua ((hang cong) or (dung cong)) tac nhan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chiet tach) OR (chinh sach)) - hanh manh cua ((hang cong) OR (dung cong)) tac nhan cap.
• Adding a wildcard symbol may retrieve word variants: theo ((chiet tach) or (chinh sach)) - hanh manh cua ((hang cong) or (dung cong)) tac nhan cap*.