Perhaps you should try some spelling variations:
trinh luatg » trinh luan, trinh quang
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
ban thanh » ban hanh, ban hang
thanh ban » thanh san, thanh van, thanh bac
ban cong » bang cong, van cong, phan cong
cong ban » cong bang, cong san, cong tan

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 ((trinh luatg) or (trinh luat)) ban cong ban thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((trinh luatg) OR (trinh luat)) ban cong ban thanh ban.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((trinh luatg) or (trinh luat)) ban cong ban thanh ban*.