Perhaps you should try some spelling variations:
dang nguong » dang thuong, tang nguon, dang cuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung nguon » dung nguoi, luong nguon, dung ngan
hanh dung » thanh dung, anh dung, hanh dong
dung cua » dung luan, dung cho
nhan dan » phan dau, gian dan, nhan tai
nhan ma » nhan mac, nhan va, nhan my

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh dung cua ((dang nguong) or (dung nguon)) dan ((nhan dan) or (nhan ma))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh dung cua ((dang nguong) OR (dung nguon)) dan ((nhan dan) OR (nhan ma)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh dung cua ((dang nguong) or (dung nguon)) dan ((nhan dan) or (nhan ma))*.