Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang de » hoang de, hanh de, hang di
y nang » ky nang, ly nang, v nang
va cao » va co, va dao, va bao
tuc va » thuc va, truc va, duc va
de cua » le cua, te cua, dieu cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang x hoi. hieu ((va cao) or (va cac)) ((tuc va) or (tuc xa)) hang de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ((va cao) OR (va cac)) ((tuc va) OR (tuc xa)) hang de cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ((va cao) or (va cac)) ((tuc va) or (tuc xa)) hang de cua te*.