Perhaps you should try some spelling variations:
tang luan » dung luan
luan hanh » luan thanh, luan han, luan danh
hanh cong » thanh cong, hang cong, hanh dong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
toan tai » doanh tai, toan cao, von tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - anh tang luan hanh cong dan ((((toan tai) or (toan tap))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - anh tang luan hanh cong dan ((((toan tai) OR (toan tap))) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo chu sach - anh tang luan hanh cong dan ((((toan tai) or (toan tap))) or (toan ban))*.