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
bang cong » dang cong, bang song, hang cong
ban thanh » ban hanh, ban hang
ban cong » van cong, phan cong, ban huong

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) OR (bang cong)) ban thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((trinh luatg) OR (trinh luat)) ((ban cong) OR (bang cong)) ban thanh san.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((trinh luatg) or (trinh luat)) ((ban cong) OR (bang cong)) ban thanh san".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((trinh luatg) or (trinh luat)) ((ban cong) OR (bang cong)) ban thanh san*.