Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
thanh di » thanh doi, thanh de, thanh do
luc ban » duc ban, cuc ban, luc bat
su sach » so sach, vu sach
tang xa » trang xa, tang ma, lang xa
sach 7 » sach y, sach 2
ve cai » va cai, ve tai, ve cau
7 tang » 6 tang
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach 7 tang xa hoi. hieu ((ve cai) or (ve cac)) luc ban thanh di ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 7 tang xa hoi. hieu ((ve cai) OR (ve cac)) luc ban thanh di ((su triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach 7 tang xa hoi. hieu ((ve cai) or (ve cac)) luc ban thanh di ((su triet) or (va triet))*.