Perhaps you should try some spelling variations:
kho tang » cao tang
hang tai » hang va, dung tai
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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: tu sach ((kho tang) or (ky nang)) lai hoi. hieu ve cham ((xuc va) OR (tuc va)) hang tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((kho tang) OR (ky nang)) lai hoi. hieu ve cham ((xuc va) OR (tuc va)) hang tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((kho tang) or (ky nang)) lai hoi. hieu ve cham ((xuc va) OR (tuc va)) hang tai va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((kho tang) or (ky nang)) lai hoi. hieu ve cham ((xuc va) OR (tuc va)) hang tai va thiet*.