Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
dan hanh » dang hanh, dan khanh, dan thanh
hieu van » hieu va, thien van, lieu va
can hanh » ban hanh, van hanh, dang hanh
te sach » toc sach
keo cua » keo sua, kho cua, khoe cua
van tom » van tam, van toi, van toa
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 (hoc sach)) ky nang x hoi. hieu van tom luoc ((can hanh) or (dan hanh)) keo cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky nang x hoi. hieu van tom luoc ((can hanh) OR (dan hanh)) keo cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang x hoi. hieu van tom luoc ((can hanh) or (dan hanh)) keo cua te*.