Perhaps you should try some spelling variations:
thang duong » thanh duong, thong duong, tang duong
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
trinh van » trinh han, trinh quan, trinh toan
duong van » duong va, luong va, dang van
ban bang » ban hang, can bang, ba bang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - hanh ((trinh van) or (tich va)) thang duong van ban bang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trinh van) OR (tich va)) thang duong van ban bang.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trinh van) or (tich va)) thang duong van ban bang*.