Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
luoc can » luc canh, hoc can, luoc dai
can bang » cao bang, can ban, van ban
bang keo » banh keo, bang kiem, bang kieu
te sach » toc sach
van tom » van tam, van toi, van toa
keo cua » keo sua, kho cua, khoe 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 (doc sach)) ky nang x hoi. hieu van tom luoc can bang keo cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (doc sach)) ky nang x hoi. hieu van tom luoc can bang keo cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (doc sach)) ky nang x hoi. hieu van tom luoc can bang keo cua te*.