Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
toa luoc » tom luoc, toan quoc
luoc can » luc canh, hoc can, luoc dai
can hanh » ban hanh, van hanh, dan hanh
van toa » van toan, van hoa, van toi
kem cua » em cua, keo cua, diem 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: ((te sach) or (toc sach)) ky nang x hoi. hieu van toa luoc can hanh kem cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang x hoi. hieu van toa luoc can hanh kem cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky nang x hoi. hieu van toa luoc can hanh kem cua te*.