Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
ty tang » tay tang, ty hang, ky tang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xuc va » tuc va, luc va, xac va
tai va » thai va, mai va, tri va
thiet » thieu

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 ((ty tang) OR (ty xang)) van hoa. hieu ve cham ((xuc va) or (duc va)) hanh tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty tang) OR (ty xang)) van hoa. hieu ve cham ((xuc va) OR (duc va)) hanh tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty tang) OR (ty xang)) van hoa. hieu ve cham ((xuc va) or (duc va)) hanh tai va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty tang) OR (ty xang)) van hoa. hieu ve cham ((xuc va) or (duc va)) hanh tai va thiet*.