Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
doi cua » dai cua, hoi cua
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cau luc » cau truc, cau phuc
va dan » ca dan, va dao, va dau
di cua » dai cua, de cua, do cua
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, me hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (ma hoa)). hieu ve cau luc va dan ((di cua) OR (doi cua)) te~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) or (ma hoa)). hieu ve cau luc va dan ((di cua) or (doi cua)) te*.