Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang cay » nang cao, nang cap, nang cai
cay phoi » cap phoi, tay hoi, cay cho
ban dang » ban hang, ban dan, van dang
dang hoi » dang khoi, dang hoai, dong hoi
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
hoi cua » hoi chuc
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang cay phoi. hieu ve ((cao duc) or (pham duc)) ban dang hoi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang cay phoi. hieu ve ((cao duc) OR (pham duc)) ban dang hoi cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang cay phoi. hieu ve ((cao duc) or (pham duc)) ban dang hoi cua te*.