Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
su triet » su tien, ve triet
co sach » bo sach, cuon sach, hoc sach
cam luc » cam xuc, cau luc
luc ban » duc ban, cuc ban, luc bat
su viet » so viet
hieu ve » hieu va, hieu van
tang ma » tang van
sach 7 » sach y, sach 2
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach 7 ((tang ma) OR (mang may)) hoa. hieu ve cam luc ban thanh hai ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach 7 ((tang ma) OR (mang may)) hoa. hieu ve cam luc ban thanh hai ((su triet) OR (su viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach 7 ((tang ma) OR (mang may)) hoa. hieu ve cam luc ban thanh hai ((su triet) or (su viet))*".